The Overlay
Na Yin (纳音) — The 60-Pillar Sound Elements
Na Yin is the classical overlay that turns each of the 60 stem-branch pillars into a short, vivid archetype — Gold in the Sea, Furnace Fire, Great Forest Wood. Thirty named sounds, six per element, used as character shorthand. Here is the complete table, the poetic image behind each sound, and how practitioners actually weight it in a reading.
TL;DR
- Na Yin (纳音 nàyīn, literally “received sound”) assigns each of the 60 stem-branch pairs to one of 30 named sounds. Every sound is grouped under one of the Five Elements, so each element gets exactly six sub-types.
- Two consecutive pillars always share the same Na Yin. 甲子 and 乙丑 are both Gold in the Sea. 丙寅 and 丁卯 are both Furnace Fire. And so on, through all 30 pairs.
- It’s a character-archetype layerover the structural reading — the BaZi equivalent of “you’re an INTJ.” Practitioners use it as a memorable flavor, not as the foundation of the analysis.
- Our engine doesn’t compute Na Yin yet. The full 60-pillar table below is all you need to look yours up by hand.
What Na Yin actually is
Na Yin is a parallel classification system built on top of the sexagenary cycle — the 60-year (and 60-day, and 60-month) rotation generated by pairing the ten Heavenly Stems with the twelve Earthly Branches. Because stems and branches only combine when their polarity matches, the cycle has 60 valid pairs rather than 120. That 60-cycle is the backbone of every pillar in a BaZi chart. You can read more about how it’s constructed in Stems & Branches.
Na Yin takes that 60-pillar cycle and assigns every pillar to a named “sound-element” — one of 30 poetic phrases like 海中金 Gold in the Sea, 炉中火 Furnace Fire, or 大林木 Great Forest Wood. The 30 names are grouped under the Five Elements in a strict 6-6-6-6-6 split: six different Gold sounds, six Wood, six Water, six Fire, six Earth. The pairs are organized so two consecutive pillars share the same sound, which is why you get 30 sounds from 60 pillars rather than 60 separate labels.
So instead of saying “your year pillar is a metal pillar,” a practitioner using Na Yin would say “your year pillar is 海中金 Gold in the Sea” — a more specific, more vivid sub-archetype of Metal. The element tells you what. The Na Yin tells you what kind.
The name 纳音 literally means “received sound” or “absorbed tone.” Classical sources tie it loosely to a musical theory in which each stem-branch pair was mapped to a pitch in the old twelve-tone system, and sounds sharing the same pitch were grouped into the same element. The musical derivation is more historical curiosity than working tool; in practice, the 30 names are passed down as a fixed table and used directly as archetypes. Nobody re-derives them from scratch.
The mental model
Na Yin is a poetic-archetype layerthat sits over the structural, ten-god, element-balance analysis most practitioners actually use to read charts. Think of it as a nickname system. It doesn’t change the underlying chart. It gives you a single phrase — “Sword-Edge Metal,” “Willow Wood,” “Great Sea Water” — that carries a flavor the element alone doesn’t.
A useful comparison is personality-type shorthand. Saying you’re an INTJ doesn’t tell you anything that a real psychological assessment wouldn’t tell you in more detail — but it’s a memorable single phrase you can drop into a conversation, and it points at a rough cluster of tendencies that other people recognize. Na Yin functions the same way inside classical Chinese metaphysics. It’s the character tag, not the chart.
That framing matters because the temptation with a phrase as vivid as Fire in the Sky or Gold in the Seais to treat it as the “real” reading and everything else as technical bookkeeping. It’s the other way around. The structural analysis is the work. Na Yin is the hook you hang it on so people remember it later.
Most modern practitioners fall into one of three camps on Na Yin. Some use it seriously as an interpretive layer, especially in relationship compatibility analysis. Some use it only as a mnemonic and treat its interpretive weight as nearly zero. A few reject it entirely as decorative baggage. All three camps agree on what the 30 assignments are — the disagreement is about how much to weight them. We lean with the middle camp here: Na Yin is fun, memorable, and occasionally sharp, but it’s a flavor layer, not a foundation.
The 60 pillars and their Na Yin
The full table, in classical sexagenary order starting from 甲子. Thirty rows, two pillars per row, one Na Yin per row. Find your day pillar (or year, or month, or hour) in the left column, and read off the sound name. The element accent tells you which of the five elemental sub-groups the sound belongs to.
| # | Pillars | Na Yin | English | Element |
|---|---|---|---|---|
| 1 | 甲子 乙丑 Jiǎ Zǐ · Yǐ Chǒu | Hǎi Zhōng Jīn | Gold in the Sea | Metal |
| 2 | 丙寅 丁卯 Bǐng Yín · Dīng Mǎo | 炉中火 Lú Zhōng Huǒ | Furnace Fire | Fire |
| 3 | 戊辰 己巳 Wù Chén · Jǐ Sì | 大林木 Dà Lín Mù | Great Forest Wood | Wood |
| 4 | 庚午 辛未 Gēng Wǔ · Xīn Wèi | 路旁土 Lù Páng Tǔ | Roadside Earth | Earth |
| 5 | 壬申 癸酉 Rén Shēn · Guǐ Yǒu | Jiàn Fēng Jīn | Sword-Edge Metal | Metal |
| 6 | 甲戌 乙亥 Jiǎ Xū · Yǐ Hài | 山头火 Shān Tóu Huǒ | Fire on the Mountain Peak | Fire |
| 7 | 丙子 丁丑 Bǐng Zǐ · Dīng Chǒu | 涧下水 Jiàn Xià Shuǐ | Water in the Ravine | Water |
| 8 | 戊寅 己卯 Wù Yín · Jǐ Mǎo | 城头土 Chéng Tóu Tǔ | City Wall Earth | Earth |
| 9 | 庚辰 辛巳 Gēng Chén · Xīn Sì | Bái Là Jīn | White Wax Metal | Metal |
| 10 | 壬午 癸未 Rén Wǔ · Guǐ Wèi | 杨柳木 Yáng Liǔ Mù | Willow Wood | Wood |
| 11 | 甲申 乙酉 Jiǎ Shēn · Yǐ Yǒu | 泉中水 Quán Zhōng Shuǐ | Spring Water | Water |
| 12 | 丙戌 丁亥 Bǐng Xū · Dīng Hài | 屋上土 Wū Shàng Tǔ | Rooftop Earth | Earth |
| 13 | 戊子 己丑 Wù Zǐ · Jǐ Chǒu | 霹雳火 Pī Lì Huǒ | Thunderbolt Fire | Fire |
| 14 | 庚寅 辛卯 Gēng Yín · Xīn Mǎo | 松柏木 Sōng Bǎi Mù | Pine and Cypress Wood | Wood |
| 15 | 壬辰 癸巳 Rén Chén · Guǐ Sì | 长流水 Cháng Liú Shuǐ | Long-Flowing Water | Water |
| 16 | 甲午 乙未 Jiǎ Wǔ · Yǐ Wèi | Shā Zhōng Jīn | Gold in the Sand | Metal |
| 17 | 丙申 丁酉 Bǐng Shēn · Dīng Yǒu | 山下火 Shān Xià Huǒ | Fire at the Foot of the Mountain | Fire |
| 18 | 戊戌 己亥 Wù Xū · Jǐ Hài | 平地木 Píng Dì Mù | Wood of the Plain | Wood |
| 19 | 庚子 辛丑 Gēng Zǐ · Xīn Chǒu | 壁上土 Bì Shàng Tǔ | Earth on the Wall | Earth |
| 20 | 壬寅 癸卯 Rén Yín · Guǐ Mǎo | Jīn Bó Jīn | Gold Leaf | Metal |
| 21 | 甲辰 乙巳 Jiǎ Chén · Yǐ Sì | 覆灯火 Fù Dēng Huǒ | Covered Lamp Fire | Fire |
| 22 | 丙午 丁未 Bǐng Wǔ · Dīng Wèi | 天河水 Tiān Hé Shuǐ | Heavenly River Water | Water |
| 23 | 戊申 己酉 Wù Shēn · Jǐ Yǒu | 大驿土 Dà Yì Tǔ | Great Post-Road Earth | Earth |
| 24 | 庚戌 辛亥 Gēng Xū · Xīn Hài | Chāi Chuàn Jīn | Hairpin and Bracelet Metal | Metal |
| 25 | 壬子 癸丑 Rén Zǐ · Guǐ Chǒu | 桑柘木 Sāng Zhè Mù | Mulberry Wood | Wood |
| 26 | 甲寅 乙卯 Jiǎ Yín · Yǐ Mǎo | 大溪水 Dà Xī Shuǐ | Great Stream Water | Water |
| 27 | 丙辰 丁巳 Bǐng Chén · Dīng Sì | 沙中土 Shā Zhōng Tǔ | Sand and Earth | Earth |
| 28 | 戊午 己未 Wù Wǔ · Jǐ Wèi | 天上火 Tiān Shàng Huǒ | Fire in the Sky | Fire |
| 29 | 庚申 辛酉 Gēng Shēn · Xīn Yǒu | 石榴木 Shí Liú Mù | Pomegranate Wood | Wood |
| 30 | 壬戌 癸亥 Rén Xū · Guǐ Hài | 大海水 Dà Hǎi Shuǐ | Great Sea Water | Water |
A few things to notice. First, the order isn’t random — the table walks the sexagenary cycle straight through, so the Na Yin sequence also repeats every 60 pillars. Second, the element assigned to a Na Yin pair isn’t always the element of the pillar’s stems or branches. 甲子 is stem-Wood over branch-Water, but its Na Yin is Gold. This is one of the main reasons people push back on Na Yin’s derivation: the assignments look philosophical rather than algorithmic. Third, the two pillars that share a Na Yin always sit next to each other in the 60-cycle, and they always pair a yang stem-branch with its immediately following yin stem-branch. Every sound is a yang-yin couple under one banner.
The 30 sounds, grouped by element
The same 30 sounds, re-sorted by their five-element category so you can see the six variations of each element side by side. Each card is the short empirical read practitioners use as character shorthand plus the poetic image the name comes from. Treat them as testable hypotheses — things worth looking for in someone’s behavior and self-description — not fixed labels.
Metal — six sounds
Gold scattered on the ocean floor — present, but submerged, requiring effort to surface.
Latent capability that doesn’t show in casual interaction. People who’ve known them a long time often describe them very differently than people who’ve known them briefly.
The forged and sharpened edge of a blade — tempered, decisive, and finished.
Sharp, principled, and willing to cut. Reads as direct and sometimes adversarial; very low tolerance for vagueness or bad reasoning.
Silvery metal in a soft, workable state — ornamental rather than weaponized.
Refined, aesthetic, deliberate. Reads as polished, taste-driven; the standards are high but the edge is rarely shown.
Gold dust mixed into riverbed sand — valuable, but requiring a sieve to separate from everything else.
Overlooked in casual sorting. Reads as easy to miss until examined closely; the value is real but needs a reader willing to pan for it.
Gold hammered into thin leaf and applied as surface — decorative, delicate, everywhere it’s seen.
Presentation-conscious and surface-strong. Reads as highly finished; tends to work in domains where appearance is part of the product — design, performance, public-facing craft.
Metal shaped into jewelry — precious, relational, worn as a signal between people.
Relationship-oriented and signal-aware. Reads as someone who reads social context closely and uses appearance and gifts as a considered language.
Wood — six sounds
A dense forest of mature trees — many individuals forming a single canopy.
Large presence, collective instincts, slow to move but hard to stop once moving. Often reads as someone who builds ecosystems rather than solo projects.
The willow — supple, bending, leaning over water without breaking.
Flexible and adaptive; absorbs pressure rather than resisting it. Reads as emotionally responsive and hard to offend directly.
Evergreens that hold shape through winter — old, straight-trunked, and unfazed by cold.
Durable and principled. Reads as someone whose standards don’t move with the season; consistent across environments other people find punishing.
Scattered trees on an open plain — not a forest, not a garden; working trees in open country.
Practical, independent, low-decoration. Reads as someone who works on their own, covers ground, and doesn’t need a group to function.
The mulberry — the tree that feeds silkworms, the root of the silk trade; a working tree that supports an entire industry.
Productive and supply-side. Reads as someone whose work quietly underwrites other people’s visible success; indispensable at the root of a process.
The pomegranate — a small, dense, fruit-bearing tree; ornamental above, heavy with seed inside.
Compact and productive. Reads as unassuming in scale but dense in output; often more accomplished than a quick profile would suggest.
Water — six sounds
A mountain stream cutting through a narrow gorge — fast, concentrated flow in a tight channel.
Focused and persistent; works inside narrow constraints and wears them down over time. Reads as specialized rather than versatile.
Water rising from a natural spring — clean, continuous, self-replenishing.
Quietly generative. Reads as a reliable source — people come back for counsel, ideas, or steadiness, and the supply doesn’t visibly deplete.
A great river running a long course to the sea — steady volume, long horizon.
Operates on long time frames. Reads as patient and strategic; willing to move gradually toward an outcome that’s years away.
The Milky Way read as a river — water high above, out of reach, the source of all other water.
Originating rather than downstream. Reads as someone who starts things that others then depend on; ideas, frames, and projects tend to trace back to them.
A wide, fast-moving stream in spring — fresh, energetic, pushing through new terrain.
Forward-moving and exploratory. Reads as someone who prefers new routes over maintained ones; more comfortable cutting a channel than inheriting one.
The ocean — the largest body of water, the final destination of every river, unreadably deep.
Large internal world, long memory, hard to fully read. Reads as someone whose depth is obvious but whose floor is not; rarely fully known even by close friends.
Fire — six sounds
A forge or smelter — concentrated, contained heat used to transform other materials.
Intense but channeled. Reads as someone who produces output rather than burns for its own sake; the fire is always pointed at a project.
A beacon fire on a high summit — visible from a long distance, out of reach of the valley.
Visible, referenced by others, but hard to get close to. Reads as inspirational at distance and reserved up close.
A lightning strike — sudden, high-impact, gone in an instant but rearranging everything it touched.
Episodic intensity. Reads as calm most of the time, then decisive, loud, and transformative in short bursts. Tends to mark the chart’s major turning points.
Campfires and village lights at the base of a mountain at dusk — domestic fire, social fire.
Warm and convivial. Reads as the person who holds the gathering together — less dramatic than other Fire types, more consistently present.
An oil lamp under a shade — small, steady flame inside a deliberate enclosure.
Domestic, steady, night-working. Reads as someone whose intensity is real but deliberately contained; a lamp rather than a bonfire.
The sun — the largest visible fire, the reference point for everyone’s day.
Widely visible, hard to ignore. Reads as someone whose presence organizes the room around them, for better or worse; very rarely a background character.
Earth — six sounds
Soil along a well-travelled road — ordinary ground, but ground that everyone passes over.
Quietly connected to many networks. Reads as unassuming, but tends to know everyone and everything happening nearby.
The packed earth of a fortified city wall — structural, defensive, built on purpose.
Protective and institutional. Reads as someone who guards a group, a standard, or an organization; structure-minded and boundary-clear.
Tiled and packed earth on a roof — high-placed, finished, covering something.
Protective and elevated; tends to sit at the top of a structure and shelter what’s below. Reads as responsibility-carrying and role-aware.
Packed earth used to build or surface a wall — shaped by craft, holding a form.
Form-giving and craft-minded. Reads as someone who imposes structure — the person who writes the standards, codifies the process, draws the lines.
Earth of a major post road — the infrastructure of the old courier system, connecting distant cities.
Mobile, connective, travel-shaped. Reads as someone whose life arcs through multiple places and whose identity is tied to movement between networks rather than settling in one.
The granular mix of a riverbank or beach — loose, shifting, but still ground you can stand on.
Grounded but fluid. Reads as stable in character without being rigid — the kind of person who can hold a role while changing the way it’s done.
How to use Na Yin in a reading
The practical rules practitioners follow when they bring Na Yin into a reading are consistent across lineages, even if the interpretive depth varies.
Weight it lightly. Na Yin is a flavor layer, not a foundation. A serious chart reading still depends on the Day Master, element balance, ten-god structure, seasonal strength, luck pillars, and branch interactions. Na Yin sits on top of that work as a memorable character tag. If your Na Yin read contradicts your structural read, trust the structural read.
Read the day pillar first.Every pillar in a chart has its own Na Yin. Most practitioners give the day pillar’s Na Yin the most weight, because the day pillar is where the personal, selfhood analysis lives — it holds your Day Master and the branch that anchors it. The day Na Yin is the closest thing to a single-phrase character read. The year Na Yin is a secondary layer often used for generational or family framing; the month and hour Na Yin are more specialized.
Use it as memorable shorthand, not as a diagnosis. The value of Na Yin is that “Sword-Edge Metal” is easier to remember than “Yang Metal Day Master born in a strong Metal season with rooted Fire control.” It’s a hook. A good reading uses the Na Yin phrase to package the structural read in a form the person can actually carry away.
Watch for it in compatibility analysis. One area where Na Yin has historically been used more seriously is classical marriage and partnership analysis. Some lineages compare the year Na Yin of two people as a quick compatibility check — “does Great Forest Wood and Roadside Earth work together?” — before running the more detailed chart comparison. The evidence that this adds signal beyond a full structural comparison is weak, and we don’t lean on it here, but you’ll see it referenced in older material.
How to find your Na Yin
A caveat first: the BaZi engine on this site doesn’t compute Na Yin yet. The full engine output gives you every other layer — stems, branches, hidden stems, element balance, ten gods, luck pillars — but the Na Yin overlay is deliberately out of scope for the current version. We’re honest about that on the about page. The reason: Na Yin adds a named label that most practitioners use lightly, and we’d rather ship the scoring layers that carry interpretive weight first.
The workaround is trivial. Follow these steps:
- Generate your chart and read off the day pillar’s two characters (the day stem over the day branch). It’ll look like 甲子, 丙寅, 戊辰, and so on — one of sixty possible pairs.
- Scroll up to the 60-pillar table and find the row containing your day pillar. Each row has exactly two pillars; yours will be one of them.
- Read the Na Yin name on that row. That’s your day-pillar Na Yin. If you want to be thorough, repeat for your year, month, and hour pillars — you’ll end up with four Na Yin labels, one per pillar.
That’s the entire lookup. Na Yin isn’t computed; it’s retrieved from a fixed table. Every calculator that reports Na Yin is just doing the table lookup above — there’s no formula to get wrong, so any source that agrees on the pairs will give you the same answer.
Limits and honest caveats
Na Yin is one of the more symbolic corners of BaZi and it deserves a few honest caveats before you use it in a reading.
The assignments are not derived from a clean rule. Classical sources tie Na Yin to a musical-correspondence theory in which each stem-branch pair maps to a pitch, and same-pitch pairs inherit the same element. Even if you accept the historical derivation, it’s not a rule you can re-run from first principles to get the table back. The 30 names and their element groupings are essentially inherited — different lineages mostly agree on them, but nobody is re-deriving them. Treat the table as a canonical list, not as the output of a formula.
Interpretive depth varies by lineage. Classical texts give Na Yin a lot of attention — some older manuals read chart compatibility almost entirely from the year Na Yin pair. Most modern practitioners scaled that back hard once the ten-god, structural, and seasonal-strength analysis became dominant in the twentieth century. You’ll find modern teachers who treat Na Yin as mandatory, as optional, or as a historical curiosity. All three positions are defensible.
The element labels don’t always match the pillar’s actual element. A Wood pillar can have a Metal Na Yin. A Water pillar can have an Earth Na Yin. This is disorienting at first and it’s one of the reasons Na Yin isn’t folded into element-balance scoring — if you count the Na Yin element as another vote for Metal when the underlying pillar is Wood, you break the balance calculation. Na Yin lives in its own layer. Don’t cross-count.
Character reads are hypotheses. The per-sound descriptions in the table above are drawn from classical sources and practitioner consensus, stripped of mysticism. They are useful as starting hypotheses — things to notice in someone’s behavior — not as fixed personality readings. The test of a Na Yin read is whether long-term observers of the person recognize the description, not whether it “sounds right” the first time you read it.
Practitioner detail: the pitch theory behind Na Yin
The traditional derivation goes through the old twelve-pitch Chinese music system (十二律 shí'èr lǜ). Each of the 60 stem-branch pairs was mapped to one of twelve pitches, and each pitch was categorized as belonging to one of the Five Elements via a correspondence table that connected musical scale degrees to the wǔxíng. Pairs that shared a pitch ended up under the same element; the specific poetic name (Gold in the Sea, Furnace Fire, etc.) was assigned by later commentators to evoke a particular sub-flavor of that element.
The thing to notice is that the derivation is heavily mediated by the pitch-to-element correspondence, which itself isn’t a physical fact — it’s a classical aesthetic convention. Once you accept that convention, the rest follows. If you don’t accept it, the table is just a list. Both stances are compatible with using Na Yin as a working tool; you just treat it as either “derived” or “traditional” depending on where you draw the line.
A related historical note: the sexagenary cycle itself is attested on oracle bones from the Shang dynasty, more than 3,000 years ago, as a day-counting system. The Na Yin layer is much later — it’s a Han- and Tang-era interpretive addition, layered onto a cycle that was already ancient by the time the sound-elements got attached to it.
How it connects
Na Yin is one layer in the BaZi stack. It sits above the substrate (elements) and the alphabet (stems and branches), and it sits alongside — not above — the structural and relational layers where most of the actual analysis happens.
- Stems & Branches — the 22 symbols every chart is made of, and how the 60-pillar cycle that Na Yin sits on top of is generated.
- The Five Elements — the substrate Na Yin is organized under. Every sound belongs to one of these five.
- The 10 Day Masters — the structural anchor you should read before (and weight more heavily than) any Na Yin overlay.
- Reading a Chart — the workflow a full reading actually follows; Na Yin slots in as a late, optional flavor layer.
FAQ
Why are there 30 sounds instead of 60?
Because each sound covers two consecutive pillars — a yang pillar and the immediately following yin pillar. 甲子 (yang) and 乙丑 (yin) share Gold in the Sea; 丙寅 and 丁卯 share Furnace Fire; and so on. The pairing is always yang-then-yin, which is consistent with how the sexagenary cycle alternates polarity, and it means you get exactly 30 sound-labels from 60 pillars.
Why doesn't the Na Yin element match the pillar's element?
Because Na Yin isn't derived from the pillar's own stem and branch directly. It comes from a separate correspondence table — historically, a musical-pitch mapping — that assigns each pair to a sound, and each sound to an element. The two layers are independent. A pillar made of stem-Wood and branch-Water can end up with Gold as its Na Yin element, and that's expected behavior. It's why Na Yin lives in its own layer and isn't added to element-balance scoring.
Which of my four pillars' Na Yin should I read?
Start with the day pillar — that's where the personal, selfhood analysis lives, and its Na Yin is the closest thing to a single-phrase character label. If you want more detail, add the year Na Yin (often used for generational framing and in older compatibility analysis), then month, then hour. In practice, most modern practitioners only ever discuss the day and year Na Yin; the month and hour Na Yin are specialized and rarely cited in casual readings.
Is Na Yin compatible with my Western sun sign?
They are separate systems that don't translate into each other. Na Yin is a sub-classification of a Chinese calendar cycle based on the 60-pillar stem-branch structure; Western sun signs are based on ecliptic positions of the sun and planets at birth. There is no principled mapping between them. Some people enjoy holding both as independent character lenses, which is fine. There's no derivation that lets you compute one from the other.
Why didn't you implement Na Yin in the engine?
Na Yin is a fixed lookup table, not a computation — there's no algorithmic work to do beyond mapping each of the 60 pillars to its sound. We prioritized the interpretive layers that carry actual analytical weight: element balance, Day Master strength, ten gods, luck pillars, and branch interactions. Na Yin is a memorable but lightly weighted overlay, and the full table on this page is enough to look yours up by hand in about ten seconds. We may add it to the engine output later as a labeling convenience.
Can I use Na Yin for compatibility with a partner?
Classically, yes — some older lineages compared two people's year Na Yin as a quick partnership check. Modern practice is more skeptical. A full compatibility comparison using ten gods, element balance, clashes, and combinations will give you a much more specific read than matching two Na Yin labels. Use Na Yin compatibility as a fun conversation opener, not as decision input for a serious relationship call.