The 72 Microseasons of Japan

Finding Poetry in Nature's Subtle Changes

In Japan, the changing seasons have always held deep cultural significance. While most of us experience a typical four seasons, traditional Japanese culture recognizes a more nuanced progression of time: the 72 microseasons (七十二候, shichijūni kō). I think it's this focus that leads to Japanese people asking visitors if they have seasons in their countries. The 72 microseasons divide the year into periods of roughly five days each. Unlike the Western calendar's rigid months, these divisions mark subtle natural phenomena: Harukaze kōri o toku ("East wind melts the ice"), Sakura hajimete saku ("First cherry blossoms"), Higurashi naku ("Evening cicadas sing"). This system originated in ancient China and was adapted for Japan's climate around the 8th century AD. It's built on top of the 24 solar terms ("sekki"), which themselves divide the year into ~15-day periods aligned with the sun's position. Year → 4 Seasons → 24 Solar Terms → 72 Microseasons (3 months) (~15 days) (~5 days)

Each solar term contains three microseasons:

Solar Term Meaning Example Microseasons

立春 Risshun Start of Spring East wind melts ice, Warblers sing, Fish emerge

夏至 Geshi Summer Solstice Self-heal withers, Irises bloom, Crow-dipper sprouts

秋分 Shūbun Autumn Equinox Thunder ceases, Insects hole up, Farmers drain fields

冬至 Tōji Winter Solstice Self-heal sprouts, Deer shed antlers, Wheat sprouts under snow

In our age of climate control and supermarket seasons, we've largely disconnected from nature's rhythms. The microseasons offer a gentle invitation to pay attention again: Notice the small things: The first hint of plum blossoms, the return of swallows, the way morning dew appears differently through the year.

Embrace impermanence: Each microseason lasts only five days. Like everything beautiful, it passes. This echoes the Buddhist concept of mujō (無常).

Live seasonally: Traditional Japanese cuisine (washoku) emphasizes seasonal ingredients. The microseasons provide a framework for eating with nature's rhythm.

The Microseasons in Practice

On this site, you'll see a microseason card in the sidebar showing the current period along with its poetic Japanese name. It's a small reminder that time moves not just in hours and days, but in the blooming of peonies and the flight of geese. Some favorites throughout the year: Spring 櫻始開 (Sakura hajimete saku) — First cherry blossoms (Mar 26-30) 虹始見 (Niji hajimete arawaru) — First rainbows (Apr 15-19) Summer 腐草為螢 (Kusaretaru kusa hotaru to naru) — Rotting grass becomes fireflies (Jun 11-15) 蓮始開 (Hasu hajimete hiraku) — First lotus blossoms (Jul 12-16) Autumn 菊花開 (Kiku no hana hiraku) — Chrysanthemums bloom (Oct 13-17) 楓蔦黄 (Momiji tsuta kibamu) — Maple leaves turn yellow (Nov 2-6) Winter 熊蟄穴 (Kuma ana ni komoru) — Bears retreat to their dens (Dec 12-16) 雪下出麦 (Yuki watarite mugi nobiru) — Wheat sprouts under snow (Jan 1-4) Nippon.com: Japan's 72 Microseasons Kyoto Journal: The 72 Micro Seasons Kurashi no Gendai: 72 Seasons App The microseason card on this site updates daily, showing you where we are in this ancient cycle. Take a moment to notice what's happening in nature around you—you might be surprised how closely it matches these centuries-old observations. Originally published at cogley.jp Rick Cogley is CEO of eSolia Inc., providing bilingual IT outsourcing and infrastructure services in Tokyo, Japan.