ISEKADO, the craft beer brand of Kadoya Tea House, and CHITOSE Group (CHITOSE) have jointly developed “CHITOSE SAISON Midori” a Botanical Brew™ made with CHITOSE’s spirulina tabérumo. It will be released in Japan in limited quantities on November 11, 2026. 

“Day drinking? No, I’m photosynthesizing.”
People relax in the sun. Microalgae thrive in it. We wanted to turn that shared time in the sunlight into a drink. So if anyone raises an eyebrow at you for having a drink on a sunny weekend afternoon, you have the perfect answer: “Actually, I’m photosynthesizing.” 

Two Microbe Experts, One Brew
ISEKADO is based in Ise, a city in central Japan known as the home of Ise Grand Shrine, the most sacred Shinto shrine in the country. For centuries, pilgrims have traveled to Ise from all over Japan, and since 1575, Kadoya Tea House has welcomed them with its mochi, a traditional rice cake. In 1997, this 450-year-old confectioner began brewing craft beer under the name ISEKADO. The brewery has since won gold at the International Brewing Awards at four consecutive competitions and now exports to 15 countries.

CHITOSE is a group of biotechnology companies with over 20 years of expertise in unlocking the power of microorganisms, including microalgae, to foster a sustainable society. One signature result of this work is tabérumo, fresh spirulina grown in sunlight and flash-frozen in its “raw” state without heating.

The new brew combines KADOYA1, ISEKADO’s original wild yeast collected from a forest in Ise, with CHITOSE’s tabérumo. In October 2026, ISEKADO also joined MATSURI, CHITOSE’s cross-industry co-creation initiative to promote the bioeconomy, and the two companies look forward to building on this collaboration. 

Light, Crisp, and Green in the Sun
This saison opens with a gently sweet aroma, followed by lively carbonation and a clean, pleasant bitterness. At 2.5% ABV, it is easy to enjoy during the day. Indoors, its color is a calm green. Hold it up to the sun, and it glows like young leaves in dappled light. Pour it into a glass on a balcony, at a picnic, or at a campsite, and see for yourself.

Product information
・Name: CHITOSE SAISON Midori
・Style: Saison
・ABV: 2.5%
・Volume: 350 ml
・Storage: Keep refrigerated (10°C or below); unpasteurized and unfiltered
・Release date: November 11, 2026 (Japan)
・Best before: 180 days from filling 

*Please drink responsibly. The legal drinking age in Japan is 20.
*People with seaweed allergies should consult a doctor before drinking.