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Oishi Chaen

株式会社大石茶園大石茶園

Oishi Chaen (株式会社大石茶園, OISHI TEA FACTORY) is a long-established Yame tea manufacturer founded on April 1, 1940 by Oishi Mitsuyoshi in Murotaoka, Yame City, Fukuoka Prefecture. Now led by third-generation owner Oishi Goji (大石剛司), the company has grown from a local producer into one of Yame's major wholesale tea manufacturers with capital of ¥50 million. In 1954 Kenji Oishi took over management, and the company was renamed in 1972. A landmark came in 1977 when Oishi Chaen won the Japan Agricultural Minister's Award for gyokuro quality. In 1991 they established a retail subsidiary, 株式会社お茶村 (Ochamura), to reach consumers directly. The company invested in CCD optical sorting systems in 2008 and achieved FSSC22000 food safety certification and JAS Organic certification in 2018. Oishi Chaen exports its Yame matcha and gyokuro to over 40 countries worldwide. Their matcha is described as a rich, well-balanced blend of umami from Yame tencha, crafted for a mellow and blissful cup.

Brand Facts

Japanese name: 株式会社大石茶園
Founded: 1940
Headquarters: Yame, Fukuoka
Origin regions: Yame
Certifications: JAS Organic
Official site: oishichaen.co.jp
Ships to: Japan, International
Price/gram range: ¥83–¥99/g
Blends tracked: 7

Origin regionsYame

CertificationsJAS Organic

Blend Lineup

7 blends

Where to Buy Oishi Chaen in Japan

Official stores and authorized retailers across Japan.

Headquarters Official Store Authorized Retailer

Yame, Fukuoka

Frequently Asked Questions

When was Oishi Chaen founded?: Oishi Chaen was established in 1940 in Yame, Fukuoka. It is a pre-war era matcha producer with 86 years of history.
Where is Oishi Chaen matcha grown?: Oishi Chaen sources its matcha from Yame in Fukuoka prefecture, one of Japan's recognized matcha-producing regions.
What tea cultivars does Oishi Chaen use?: Oishi Chaen works with 5 tea cultivars: Kirari 31, Okumidori, Saemidori, Yabukita, Tsuyuhikari. Different cultivars contribute distinct umami, sweetness, and color profiles to each blend.
Which Oishi Chaen matcha is best for lattes?: Oishi Chaen has 3 blends suitable for lattes: Yame Kirari, Yame Suihou, Yame Tsuyuhikari. These are selected for their ability to maintain flavor intensity when mixed with milk.
How many matcha products does Oishi Chaen offer?: Oishi Chaen currently offers 7 matcha blends. The lineup ranges from Yame Kirari to Yame Tsuyuhikari, covering different preparation styles and price points.
Why is Oishi Chaen matcha more expensive?: Oishi Chaen matcha ranges from ¥83 to ¥99 per gram, placing it in the premium tier. Higher pricing typically reflects stone-milling, single-origin sourcing, specific cultivar selection, or traditional production methods — and Oishi Chaen's 86-year heritage.
Where does Oishi Chaen ship to?: Oishi Chaen ships to: Japan, International. Availability may vary — check their official site for current shipping options.
Where can I buy Oishi Chaen matcha in Japan?: Oishi Chaen has 2 retail locations in Japan, including 株式会社大石茶園 in Yame.
Is Oishi Chaen matcha organic?: Yes, Oishi Chaen matcha is certified organic, meaning it is produced without synthetic pesticides or chemical fertilizers.

Sources

Sources (4)

Oishi Tea Factory Official Website

Accessed Mar 24, 2026Confidence: 98%

Supports: Founded 1940, headquarters Yame Fukuoka, FSSC22000 & JAS Organic certifications, representative Goji Oishi, capital 50M JPY

Oishi Chaen Company History

Accessed Mar 22, 2026Confidence: 97%

Supports: Founded April 1 1940 by Oishi Mitsuyoshi; 1954 Kenji took over; 1972 renamed; 1977 Agricultural Minister Award; 1991 Ochamura established; 2008 CCD systems; 2018 FSSC22000 + JAS Organic

Oishi Chaen Company Profile

Accessed Mar 22, 2026Confidence: 97%

Supports: Rep: Oishi Goji; Capital ¥50M; Address 福岡県八女市室岡1071

Oishi Chaen Official Site

Accessed Mar 22, 2026Confidence: 95%

Supports: Brand overview, matcha product line, export markets

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Frequently Asked Questions

When was Oishi Chaen founded?

Oishi Chaen was established in 1940 in Yame, Fukuoka. It is a pre-war era matcha producer with 86 years of history.

Where is Oishi Chaen matcha grown?

Oishi Chaen sources its matcha from Yame in Fukuoka prefecture, one of Japan's recognized matcha-producing regions.

What tea cultivars does Oishi Chaen use?

Oishi Chaen works with 5 tea cultivars: Kirari 31, Okumidori, Saemidori, Yabukita, Tsuyuhikari. Different cultivars contribute distinct umami, sweetness, and color profiles to each blend.

Which Oishi Chaen matcha is best for lattes?

Oishi Chaen has 3 blends suitable for lattes: Yame Kirari, Yame Suihou, Yame Tsuyuhikari. These are selected for their ability to maintain flavor intensity when mixed with milk.

How many matcha products does Oishi Chaen offer?

Oishi Chaen currently offers 7 matcha blends. The lineup ranges from Yame Kirari to Yame Tsuyuhikari, covering different preparation styles and price points.

Why is Oishi Chaen matcha more expensive?

Oishi Chaen matcha ranges from ¥83 to ¥99 per gram, placing it in the premium tier. Higher pricing typically reflects stone-milling, single-origin sourcing, specific cultivar selection, or traditional production methods — and Oishi Chaen's 86-year heritage.

Where does Oishi Chaen ship to?

Oishi Chaen ships to: Japan, International. Availability may vary — check their official site for current shipping options.

Where can I buy Oishi Chaen matcha in Japan?

Oishi Chaen has 2 retail locations in Japan, including 株式会社大石茶園 in Yame.

Is Oishi Chaen matcha organic?

Yes, Oishi Chaen matcha is certified organic, meaning it is produced without synthetic pesticides or chemical fertilizers.

Sources

Sources (4)

Oishi Tea Factory Official Website

Accessed Mar 24, 2026Confidence: 98%

Supports: Founded 1940, headquarters Yame Fukuoka, FSSC22000 & JAS Organic certifications, representative Goji Oishi, capital 50M JPY

Oishi Chaen Company History

Accessed Mar 22, 2026Confidence: 97%

Supports: Founded April 1 1940 by Oishi Mitsuyoshi; 1954 Kenji took over; 1972 renamed; 1977 Agricultural Minister Award; 1991 Ochamura established; 2008 CCD systems; 2018 FSSC22000 + JAS Organic

Oishi Chaen Company Profile

Accessed Mar 22, 2026Confidence: 97%

Supports: Rep: Oishi Goji; Capital ¥50M; Address 福岡県八女市室岡1071

Oishi Chaen Official Site

Accessed Mar 22, 2026Confidence: 95%

Supports: Brand overview, matcha product line, export markets