Joshu Shirakubo no Ochakou: A Medieval Tea-Tasting Ritual Alive in Rural Gunma

Tucked away in the quiet mountain hamlet of Shirakubo in Nakanojo Town, Gunma Prefecture, a centuries-old tea-guessing ritual known as Joshu Shirakubo no Ochakou (上州白久保のお茶講) continues to captivate participants every February. Designated as an Important Intangible Folk Cultural Property of Japan in 1990, this living tradition preserves the spirit of medieval tōcha (闘茶) — competitive tea tasting — in a form that is both a Shinto ritual and a joyful community gathering. For visitors seeking an authentic encounter with Japan's intangible heritage far from the tourist crowds, Ochakou offers a window into the heart of rural Japanese culture.

What Is Ochakou? The Art of Tea Guessing

Ochakou literally means "tea gathering" or "tea lecture," and it belongs to a tradition once widespread across the Agatsuma region of Gunma Prefecture. While most communities have long abandoned the practice, the Shirakubo district has faithfully maintained it for centuries.

The ritual centers on a tea-guessing competition. Four distinct blended teas are prepared using three base ingredients: sencha (astringent green tea), amacha (sweet hydrangea tea), and chinpi (dried mandarin orange peel). Each ingredient is carefully roasted in a clay pan called a hōroku, then ground into powder with a stone mortar. These powders are blended in specific ratios to create four uniquely flavored teas, each given a name: Ichi-no-cha (First Tea), Ni-no-cha (Second Tea), San-no-cha (Third Tea), and Kyaku (Guest Tea).

Participants first sample all four teas to learn their flavors. Then, over seven rounds, teas are served in random order and participants must identify which of the four varieties they are drinking. Their answers are recorded by a designated scorekeeper called the katsu (勝), who enters the results into a handwritten ledger known as the Ochakō Renmei-chō (Tea Gathering Registry).

A Shinto Ritual and Harvest Divination

Ochakou is more than a game — it is a sacred Shinto rite held as an eve-festival (yoimatsuri) of Shirakubo Tenmangū Shrine, dedicated to Tenjin, the deity of learning. Before the competition begins, the prepared teas are ceremonially offered to the shrine.

The results carry spiritual significance: if many participants achieve a perfect score (Hanakatsūgi, meaning "flower bearer") or, conversely, if many get every answer wrong (Sakasappana, meaning "upside-down flower"), it is considered an omen of an abundant harvest for the coming year. This dual interpretation — where both extremes of success and failure point toward prosperity — reflects a uniquely optimistic and communal worldview.

Why It Was Designated an Important Intangible Folk Cultural Property

The Japanese government designated Joshu Shirakubo no Ochakou as an Important Intangible Folk Cultural Property on March 29, 1990, for several compelling reasons.

First, the event preserves in remarkable detail the format of tōcha (competitive tea tasting), a practice that flourished among the warrior and aristocratic classes of 14th-century Japan. While tōcha disappeared from mainstream culture centuries ago, Shirakubo's Ochakou maintains its essential structure — the blending, tasting, and competitive guessing of teas — in an unbroken living tradition.

Second, the discovery of a historical record called the Ocha-kō Oboechō (御茶香覚帳), dated to 1799 (Kansei 11), provided documentary proof that the ritual was already being conducted in its current form over two centuries ago. This document, which had survived by extraordinary chance — most similar records were repurposed as backing paper for sliding doors due to the scarcity of paper — was cross-referenced with census records and gravestone inscriptions to authenticate participants' identities, confirming the deep historical roots of the practice.

Third, while ochakou traditions were once found across several communities in the Agatsuma region, most have disappeared. Shirakubo's version stands as essentially the sole surviving example, making its preservation critically important.

Highlights and Unique Charms

Playful Pseudonyms and Illustrated Records

During the competition, each participant receives a special pseudonym used only during Ochakou. These names draw from everyday life and nature — Hana (Flower), Tori (Bird), Kaze (Wind), Tsuki (Moon), Kin (Gold), Gin (Silver), Daizu (Soybean), Soba (Buckwheat), and Negi (Green Onion), among others. These whimsical aliases add a layer of festive anonymity and fun.

After results are announced, the scorekeeper draws small illustrations in the registry to mark each participant's performance: an umbrella for Karakasa (three correct), a plum blossom for Hanakatsūgi (all correct), and so on. These charming illustrated records are preserved in the community's dedicated Ochakō no Ie (Tea Gathering House) and form a valuable folk art archive.

Sweets as Prizes

Correct guessers receive candy, chocolate, and other sweets as prizes. The clever distribution system means that the fewer people who answer correctly in a given round, the more sweets each winner receives — adding a delightful element of competitive suspense to every sip.

A Community Bonding Experience

All 16 households of the Shirakubo settlement are members of the Shirakubo Ochakou Preservation Society. Residents have participated since childhood, learning the traditions naturally through observation. The atmosphere is warm, relaxed, and welcoming — after the event, participants simply go home without a formal banquet, which locals believe has helped the tradition endure without the disputes that can accompany alcohol-fueled gatherings.

Visiting Joshu Shirakubo no Ochakou

The main Ochakou ceremony takes place annually on February 24 at the Ochakō no Ie (Tea Gathering House) in the Gotanda area of Nakanojo Town. This traditional house serves as both the venue for the ritual and a repository for historical records.

While the formal ceremony is primarily for community members, experience sessions are available for visitors by advance reservation through the Nakanojo Town Tourism Association. These hands-on workshops allow participants to try the full tea-guessing process — from roasting the ingredients in a hōroku and grinding them with a stone mortar to tasting the blended teas and competing in the guessing rounds. This experience typically takes about one and a half hours and provides an immersive encounter with the tradition.

For international visitors, it is recommended to contact the Nakanojo Town Tourism Association in advance to inquire about available dates and any language assistance that may be provided.

Nearby Attractions

Nakanojo Town is blessed with an abundance of natural beauty and cultural attractions that complement a visit to Ochakou.

Shima Onsen: One of Gunma's top four hot spring resorts, Shima Onsen is located about 40 minutes by bus from Nakanojo Station. Its mineral-rich waters are said to cure countless ailments, and the atmospheric town features historic ryokan, including the famous Sekizenkan — often cited as the inspiration for the bathhouse in Studio Ghibli's Spirited Away.

Sawatari Onsen: Known as the "finishing bath" of Kusatsu Onsen, Sawatari's gentle, skin-softening waters offer the perfect complement to the region's more potent hot springs. The area is steeped in literary history, having been visited by the poet Bokusui Wakayama.

Nakanojo Biennale: Held every two years, this international contemporary art festival transforms abandoned schools, warehouses, and natural spaces across Nakanojo into exhibition venues, drawing artists and visitors from around the world.

Nakanojo Museum of History and Folk Culture (Musée): This museum houses exhibits on local history and folk customs, including materials related to Ochakou and other traditional practices of the Agatsuma region.

Okushimako Lake: A stunningly blue reservoir lake surrounded by forested mountains, perfect for canoeing, hiking, and photography.