Yi Hai (乙亥): the Yin Wood Pig, pillar 12 of 60
Last checked · images quoted from the San Ming Tong Hui on Chinese Wikisource; dates calculated
Compiled by the Fengshui Zen editors · About and method
乙亥 is pillar 12 of the sixty: the yin wood stem 乙 Yi over the Pig branch 亥 Hai. The last 乙亥 year was 1995 and the next is 2055; the next 乙亥 day is Oct 28, 2026. The San Ming Tong Hui gives it the image of the heat of fire, and it shares the Na Yin Mountain Fire (山头火) with 甲戌.
Stem
乙 Yi · Yin Wood
Branch
亥 Hai · Pig · Water
Na Yin
山头火 Mountain Fire
Void branches
申酉 (Monkey, Rooster)
乙亥 in the San Ming Tong Hui (三命通會)
By Wan Minying (Ming dynasty), chapter one, quoted from Chinese Wikisource; translations are ours.
Image, from the list of the sixty pillars
乙亥……火之热气
乙亥: the heat of fire.
Why its Na Yin is called 山头火, from 「论纳音取象」
山乃藏形，头乃投光，内明外暗，隐而不显
The mountain hides its form and the peak casts light: bright inside, dark outside, hidden and not displayed.
Its Na Yin against the facing one, 覆灯火 (甲辰 and 乙巳)
覆灯山头，含光畏风，投光止艮也
Covered Lamp and Mountaintop: light held in and afraid of the wind, against light cast out and coming to rest in Gen.
The likes, dislikes and star names that follow in the book are not reproduced. Read 三命通會 卷一 on Wikisource.
Inside the 乙亥 pillar
| Hidden stem in 亥 | Element | Ten God from 乙 |
|---|---|---|
| 壬 Ren (main) | Yang Water | Direct Resource 正印 |
| 甲 Jia | Yang Wood | Rob Wealth 劫财 |
| Branch element against the stem | Water 水: an element that produces the stem (Wood) |
|---|---|
| Root of the stem | Yi is rooted in 亥: 甲 among the hidden stems is Wood |
| Twelve stages | Yi is in 死 Death on 亥 |
| Ten-day group (旬) | starts with 甲戌; void branches 申 Shen, 酉 You |
| As an hour pillar | the Pig hour, 21:00-23:00, on 甲 and 己 days |
How 亥 Hai relates to the other branches
| Six Harmony (六合) | 寅 Yin (Tiger), associated with Wood |
|---|---|
| Clash (六冲) | 巳 Si (Snake) |
| Harm (六害) | 申 Shen (Monkey) |
| Punishment (刑) | itself (自刑) |
| Three Harmony (三合) | 亥卯未: the Wood frame |
| Seasonal group (方合) | 亥子丑: North, Winter, Water |
乙 Yi against each Day Master
| Day Master | 乙 is its | Chinese |
|---|---|---|
| 甲 Jia Wood | Rob Wealth | 劫财 Jie Cai |
| 乙 Yi Wood | Friend | 比肩 Bi Jian |
| 丙 Bing Fire | Direct Resource | 正印 Zheng Yin |
| 丁 Ding Fire | Indirect Resource | 偏印 Pian Yin |
| 戊 Wu Earth | Direct Officer | 正官 Zheng Guan |
| 己 Ji Earth | Seven Killings | 七杀 Qi Sha |
| 庚 Geng Metal | Direct Wealth | 正财 Zheng Cai |
| 辛 Xin Metal | Indirect Wealth | 偏财 Pian Cai |
| 壬 Ren Water | Hurting Officer | 伤官 Shang Guan |
| 癸 Gui Water | Eating God | 食神 Shi Shen |
乙亥 years, 1900 to 2100
Next 乙亥 months and days
China Standard Time; a month runs from one jie solar term to the next.
Months
- Nov 7, 2029 to Dec 7, 2029
- Nov 7, 2034 to Dec 7, 2034
Days
- Oct 28, 2026
- Dec 27, 2026
- Feb 25, 2027
- Apr 26, 2027
- Jun 25, 2027
- Aug 24, 2027
FAQ
Is 乙亥 a good or bad pillar?
Not on its own; that depends on the whole chart, which this site does not read. Structurally, Yi is rooted in 亥, which clashes with 巳 and combines with 寅.
What is the Na Yin of Yi Hai?
Mountain Fire (山头火), which Yi Hai shares with 甲戌 Jia Xu; the Na Yin names go in pairs, 30 for the 60 pillars. The San Ming Tong Hui explains how the name was chosen in its 论纳音取象 section, quoted above.
Which years are Yi Hai (乙亥) years?
Between 1900 and 2100: 1935, 1995, 2055. Each starts at Lichun, around February 4, not on January 1. Under the Chinese New Year rule the same years are the Year of the Yin Wood Pig.
Neighboring and related pillars
Quotations keep the script of the source. Not a reading, a prediction or advice.