by Kitagawa Hanbee北川半兵衛商店
The official Japanese listing identifies Seikaihaku as an Urasenke-preferred usucha and states Kyoto Prefecture origin. It is sold in 20g, 40g, 200g, and 400g tins.

Editorial verdict
One of the most clearly positioned usucha tins in the current lineup, useful for shoppers who want an explicitly thin-tea-oriented ceremonial matcha.
No buying options yet — check back soon. Visit the brand page for more information.
Other blends you might like
Kitagawa Hanbee official store Seikaihaku product page — 祇園 北川半兵衛
Supports: 20g price 2138.00 JPY; Kyoto Prefecture origin; package sizes 20g/40g/200g/400g; official product availability.
About the brand
北川半兵衛商店
Founded in Uji in 1861, Kitagawa Hanbee is a long-established Kyoto tea wholesaler whose official Japanese site emphasizes strict quality control, tea-ceremony matcha, and a current retail footprint under the Gion Kitagawa Hanbee name.
View all Kitagawa Hanbee blendsSeikaihaku is priced at ¥2,138 for 20g (¥107/g).
Seikaihaku is recommended for usucha. Thin tea — the standard way to prepare matcha, whisked with about 2g of powder and 70ml of water.
You can buy Kitagawa Hanbee Seikaihaku directly from Kitagawa Hanbee's official website. Current availability: in-stock.