Yamamasa Koyamaen Seiun (30g)

High-Quality Koicha from Kyoto, Japan

Seiun (星雲) is a high-quality koicha grade matcha from Yamamasa Koyamaen, a historic tea producer based in Uji, Kyoto. Formulated specifically for koicha (thick tea), it provides the dense structure required for kneading, while also whisking into an exceptionally rich, full-bodied usucha (thin tea).

Flavor Profile

Seiun produces a deep green liquor with a heavy, velvety mouthfeel. The flavor structure is built on an intense umami base and a robust sweetness, accented by distinct toasted seed aromatics. It finishes with a long, lingering aftertaste and minimal astringency.

Best For

Seiun is particularly suited to:

• Koicha (thick tea)
• Usucha (thin tea)
• Traditional tea rituals
• Drinkers seeking a robust, full-bodied flavor profile with heavy umami

How to Prepare Seiun

Koicha (Thick Tea)

You will need:

• 3–4g matcha
• 30–40ml water
• Water at 75–80°C / 167–176°F
• Bamboo whisk (chasen)
• Matcha bowl (chawan)
• Sifter

Steps:

1. Sift the matcha into a warmed chawan.
2. Add the hot water.
3. Knead the matcha gently with the whisk in a slow, circular motion until a thick, smooth paste forms.
4. Enjoy immediately.

Usucha (Thin Tea)

You will need:

• 1.5–2g matcha
• 60–70ml water
• Water at 75–80°C / 167–176°F
• Bamboo whisk (chasen)
• Matcha bowl (chawan)
• Sifter

Steps:

1. Sift the matcha into a warmed chawan.
2. Add the hot water.
3. Whisk briskly in a W or M motion until a fine layer of froth forms.
4. Enjoy immediately.

Product Details

Product: Seiun Matcha (星雲)

Producer: Yamamasa Koyamaen

Origin: Uji, Kyoto, Japan

Harvest: First Flush / Spring

Preparation: Koicha & Usucha

Best For: Thick tea (koicha) and rich thin tea (usucha)

Storage

Store tightly sealed in a cool, dry place away from direct sunlight, heat, moisture, and strong odors. Minimize exposure to air to help preserve freshness and aroma.