Pure Water • Handmade Soba • Japanese Tradition
Knead buckwheat dough with pure spring water from Oshino Hakkai — one of Japan's most celebrated natural springs at the foot of Mt. Fuji. Roll, cut, and savour the clean, delicate flavour of soba the way it was meant to taste.
Pure Water • Handmade Soba • Japanese Tradition
Oshino Hakkai Soba is a traditional soba noodle culture nurtured by the pure spring water of Mt. Fuji. The Oshino Hakkai area, famous for its crystal-clear ponds fed by volcanic snowmelt, has long been perfect for growing high-quality buckwheat.
Made from buckwheat flour combined with carefully selected binders, soba from this region is known for its delicate taste, refined colour, and clean finish — a direct reflection of the exceptional water flowing beneath Mt. Fuji's volcanic rock for over 80 years before reaching the surface.
Oshino Hakkai (忍野八海) is a group of eight spring-fed ponds in Oshino village, Yamanashi — a UNESCO World Heritage Site component and Natural Monument of Japan. Snowmelt from Mt. Fuji filters underground through volcanic rock for over 80 years before emerging as crystal-clear spring water. Making soba with this water is a taste of Japan's most celebrated natural heritage.
Why Water Is Everything in Soba
Water makes up about half the weight of soba dough. Its mineral content, softness, and temperature directly affect the texture, aroma, and flavour of the noodles.
Mt. Fuji spring water is naturally soft, mineral-rich, and exceptionally clear. It helps buckwheat proteins bond smoothly, producing noodles with a silky texture, clean earthy aroma, and a subtle sweetness that is impossible to replicate with tap water.
When you taste soba made here, you are tasting the volcanic landscape of Mt. Fuji — 80 years of filtration in every bite.
The Characteristics of Oshino Hakkai Soba
Sourced from the underground springs of Mt. Fuji — water that is exceptionally clear, soft, and rich in minerals. This water enhances the aroma and flavour of soba in a way that cannot be replicated anywhere else.
Our soba contains about 50% buckwheat flour. Wheat flour, egg powder, and tapioca flour are added as binders to give the noodles their characteristic texture and prevent breaking during cooking.
Soba is served with simple toppings — green onions, wasabi, shredded nori seaweed, and tempura flakes — that enhance rather than overpower the clean, earthy buckwheat flavour.
Soba has been loved in Japan since the Edo period. Traditionally eaten on New Year's Eve for longevity, and always slurped — the slurping sound shows appreciation and brings out the aroma.
Choose Your Soba Experience
From the pure soba-making experience to a full Yamanashi tasting course — choose the plan that fits your day.
Walk-ins welcome · Groups up to 80 people · English support available
6 Steps to Your Own Bowl of Soba
From mixing buckwheat flour to your first slurp — every step is hands-on, guided in English, and deeply connected to the natural beauty of Mt. Fuji.
Measure 150g of buckwheat flour and add pure Mt. Fuji spring water gradually. Spread your fingers wide and mix quickly by hand, gathering the flour from the sides of the bowl until it begins to form small clumps and is fully combined. Move on to kneading when ready.
Press firmly with the palm of your hand — use your body weight if comfortable. Knead until all dry spots disappear and the surface becomes smooth and consistent. Be careful with water quantity — too much makes the dough sticky, too little makes it crack. Our staff will assist.
Dust the board lightly and flatten the dough gently with your palm. Use a rolling pin to stretch it into a very thin, even sheet — about 2.3 mm thick. A square shape helps keep noodle lengths consistent. Our staff will demonstrate the proper technique and check your progress.
Fold the dough gently in half or thirds, then cut into thin even strips using a knife with a chopstick as your width guide. Keep folds light — strong creases can cause noodles to tear during boiling. Soba noodles should be thin, delicate, and uniform in width.
Our staff boils your soba noodles — they cook quickly, in about 3 minutes. Noodles are cooked in individual batches and never mixed with those of other guests. After cooking, you may choose hot soba in broth or cold zaru soba on a bamboo tray with dipping sauce.
Itadakimasu! Slurp your soba — it enhances the aroma and shows appreciation. The flavour can change with water temperature and flour ratio, so if you try again in the future, experiment to find your perfect blend. Don't forget to try Suridane spicy seasoning on the side — it pairs beautifully.
How to Enjoy Soba
In Japan, slurping soba is completely normal — it helps you inhale the aroma while eating, which is considered part of the flavour experience. Slurp confidently and enjoy.
For cold zaru soba, dip only the lower half of the noodles in the tsuyu dipping sauce — not the whole bundle. This preserves the clean buckwheat flavour in every bite.
Suridane — Fujiyoshida's signature spicy chili seasoning — pairs surprisingly well with soba. Add a small amount to your broth or dipping sauce for a warm, umami-rich kick.
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Book Your Soba Experience
Walk-ins welcome. English support available. Groups from 1 to 80 people. Located at Lake Kawaguchi, Yamanashi — 90 minutes from Shinjuku.
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