Koshun | 香駿 – 50g

Sourcing Information

1. This tea is sourced from a tea refiner in Shizuoka.

2. The tea refiner procured crude (unrefined) Koshun tea leaves directly from the production farmer and applied the final refining processes to make it ready for us.

What is a tea refiner?

A tea refiner is a company led by seasoned tea professionals—often referred to as tea masters, or Chashi (茶師) in Japanese—who possess deep, hands-on knowledge of both tea farming and consumer preferences. With finely tuned senses and a discerning palate developed through years of experience, they tirelessly seek out and procure high-quality teas, whether directly from farmers or through tea markets.

Tea refiners, especially those based in production regions like Shizuoka, actively build relationships with local growers and often work closely with them. Through processes such as final firing, sorting, and blending, refiners enhance the flavor, aroma, and overall quality of the tea—bringing out its full potential.

While they may appear to be just wholesalers, each tea refiner has a unique philosophy, a preferred flavor profile, and distinct strengths. These differences are reflected in the final taste of the tea, adding another layer of uniqueness on top of the tea’s original characteristics, such as cultivar and terroir.

Brewing Instructions

Hot Brew
Tea / Water Ratio: 3g / 100ml
Temperature: 170°F (77°C)
Steeping Time: 1 minute

Cold Brew
Tea / Water Ratio: 15g tea leaves / 1L cold water

How to make cold brew?

Use a cold brew pitcher with a built-in strainer, or place the tea leaves in tea filter bags. Add them directly to a container of cold water and store in the refrigerator for at least 4 hours, preferably overnight. A Kyusu or teapot isn’t necessary.

Extra Cold Brew Tips

• Cold water brewing is most effective when using chilled water—not room temperature—as it allows for a slow extraction that enhances umami and sweetness while keeping bitterness and astringency at bay.
• If you prefer a more concentrated flavor, try using more tea leaves or extending the steeping time. It’s also delicious to serve it “on the rocks” — you can easily adjust the strength by adding ice or a splash of cold water.
• Whether or not to remove the tea leaves is up to you. Even if left in the container, the flavor won’t become drastically bitter or astringent, as long as it’s kept cold. For the best experience, we recommend consuming it within 24 hours, as its freshness and vibrancy will gradually fade after that.