Shigaraki Ware Coffee Kyusu "KOGA" with Airtight Lid-less Design Launches Pre-sales on Makuake

KISSHIN365 (Location: Otsu City, Shiga Prefecture; Representative: Okumura) began pre-sales for the coffee kyusu "KOGA" on the crowdfunding service "Makuake" on March 24, 2026. The product was co-developed with Mr. Taiki Okuda, the third-generation master of the Shigaraki ware kiln "Tsubohachi," established in 1955. Thanks to an airtight design that intentionally removes the lid hole found in standard teapots, and the far-infrared properties of Shigaraki soil derived from the ancient Lake Biwa strata (approx. 4 million years old), it delivers a coffee experience where a condensed aroma spreads the moment the lid is opened. It uses a full immersion method—simply pour hot water and wait 3 minutes—reproducing a stable flavor without the need for special techniques. While the planned general retail price is 11,800 yen (tax included), Makuake early support pricing starts at 8,614 yen (tax included, 27% OFF).

■ Background of "KOGA"
While the number of people enjoying coffee at home has increased in recent years, so has the demand for extraction methods that suit individual preferences. Hand-drip coffee flavor varies depending on the pouring technique, French press methods allow fine grounds to pass through, and capsule coffee often lacks sufficient aroma—existing appliances were designed to force a choice between convenience and quality. To solve these issues, KISSHIN365, based in Otsu City, Shiga Prefecture, challenged itself to fuse traditional Shigaraki ware craftsmanship with coffee culture.

■ Product Overview: Coffee Kyusu "KOGA"

<5 Key Features of the Product>

[1] Airtight design without a lid hole—Locking in the aroma and releasing it in a flourish the moment you open it
Standard teapots have a "lid hole" for steam to escape. However, this simultaneously allows the aromatic components of the coffee to escape as well. KOGA intentionally removes the lid hole and applies glaze to the inside of the lid, adopting a design that circulates steam internally. The experience of the aroma, trapped during extraction, gently rising "the moment you open the lid" is something that cannot be obtained with existing coffee equipment.

[2] Richness and Umami produced by ~4-million-year-old soil—Shigaraki soil from the ancient Lake Biwa strata
KOGA's body uses Shigaraki soil derived from ancient Lake Biwa strata from approximately 4 million years ago. We have utilized the material qualities unique to Shigaraki ware to finish it as a vessel that enriches your daily coffee time.

[3] Unglazed interior finish that creates mellowness—Shigaraki clay surface absorbs the harshness of impurities and acidity
KOGA adopts an "unglazed interior finish." The rough Shigaraki clay surface moderately absorbs the harshness of impurities and acidity during extraction, gently smoothing out the drink's character while retaining richness and umami.

[4] Full immersion method for consistent flavor—Just pour hot water and wait 3 minutes
KOGA adopts the full immersion method. Because the entire amount of grounds comes into contact with the hot water uniformly, there is no need to worry about pouring techniques like with a drip method, allowing anyone to reproduce a stable cup.

[5] 80-mesh stainless steel filter that captures the umami of coffee oils
To allow coffee oils, which are absorbed by paper filters, to pass through while minimizing the leakage of fine grounds, we arrived at an 80-mesh stainless steel filter after many prototypes. Paper filters are unnecessary, and it can be used repeatedly by washing it.

■ Manufacturing: Shigaraki Ware Kiln "Tsubohachi," established in 1955
KOGA is produced by "Tsubohachi," a Shigaraki ware kiln established in 1955 in Shigaraki-cho, Koka City, Shiga Prefecture. The third-generation master, Mr. Taiki Okuda, is a craftsman who has specialized in making "kyusu" (teapots), a rarity even within Shigaraki ware. He finishes every detail that directly impacts the user experience—such as lid fit, pouring comfort, and the unglazed interior—by hand.

■ Expert Evaluation: Mr. Masuda, Roaster at "Cafe Salon" in Otsu City, Shiga Prefecture
The development of the recipe for KOGA was supported by "Cafe Salon," located in Seta, Otsu City, Shiga Prefecture. It is a unique cafe where the owner changes depending on the day and is a spot loved by the community. Mr. Masuda, the store's roaster, evaluates KOGA as follows:
"Coffee's aroma begins the moment you pour the hot water. KOGA's aroma when you open the lid is extremely rich, and scents like fruits and nuts spread softly. Just that aroma makes your heart feel at ease. If I could drink this cup every morning, I think that alone would change my day."

■ Product Specifications
- Product name: Coffee Kyusu "KOGA"
- Size: Width approx. 108mm, Depth approx. 184mm, Height approx. 87mm
- Weight: approx. 385g
- Capacity: approx. 360cc (approx. 1-2 coffee cups)
- Material: Pottery (Shigaraki ware), Stainless steel filter
- Manufacturing: Japan (Shigaraki-cho, Koka City, Shiga Prefecture)
- Planned general retail price: 11,800 yen (tax included)

■ Makuake Pre-sale Overview
- Project duration: March 24, 2026 (Tue) – May 10, 2026 (Sun)
- Format: All-in (Successful regardless of whether the goal is reached)
- Scheduled delivery: End of July 2026
- Project URL: https://www.makuake.com/project/shigaraki-coffee-kyusu-koga/

■ Company Overview
- Company Name: KISSHIN365
- Location: Otsu City, Shiga Prefecture
- Representative: Ryohei Okumura
- Business description: Planning and sales of products that support a healthy and comfortable lifestyle
- URL: https://kisshin365.studio.site