Water Refill Station in Chatan, Okinawa — Water Station Mihama

We were founded in 1999, and this is our 26th year.

We are a long-established brand that has been offering safe, fresh water by in-store refilling since the time when the idea of "buying water" was not yet common in Okinawa.

There's a key difference because we are a water store, not a delivery service:

• Produced fresh in-store and served immediately
  We produce water on-site using our RO purification system. Through our 7-step purification process, we thoroughly remove impurities to deliver safe, great-tasting water.
• Peace of mind — see the process for yourself
  Our 7-step purification system and equipment are on display behind glass so you can observe exactly how we produce our water.
• Refill by the gallon — just ¥110/G
  No contracts, subscriptions, or minimum orders. Refill only the amount you need in your own bottle.
• Zero transport, lower environmental impact
  By picking up at the store and using reusable bottles, you help reduce CO₂ emissions from delivery and cut single-use plastic waste.

The key difference: freshness and transparency you can experience at our water store

Just 3 easy steps:

1. Prepare Your Bottle
   Bring your own bottle. If you don't have one, reusable bottles (3–5G) are available for purchase at our water store.
2. Water Filling
   Hand your bottle to our staff — we'll fill it with fresh RO water on the spot.
3. Payment
   Refill price: ¥110/G. Pay at the register after filling (cash and credit cards accepted).

Open 9:00 AM – 8:00 PM (year-round). Refill only what you need, when you need it.

No. There are no contracts, monthly fees, or minimum purchase requirements.

We offer refill-only service at ¥110 per gallon — just get the amount you need, when you need it.

• The average monthly consumption for one adult is 8–16 gallons → about ¥880–¥1,760
• For families, estimate "number of people × 8–16 gallons"
  (Example: family of 4 would be 24–48 gallons → about ¥2,400–¥4,800)

Since this is not a flat-rate system, you only pay for what you actually use

The differences come down to three key points: number of steps, performance, and verification system:

You can see the equipment in-store, so you can witness the scale and process difference for yourself when you visit.

Our patented in-store RO purification system produces water that is served within 24 hours of production at the latest.

Unlike bottled water, which can take days or even weeks due to transport and storage, we provide freshly filtered pure water on the spot — ensuring both taste and dissolved oxygen levels are fresh.

※ We also offer tasting comparisons so you can experience the difference yourself. Feel free to ask our staff!

Yes. You can buy a hot & cold water dispenser outright for a one-time ¥42,000 — no rental contract, no monthly fees, no delivery subscription. You own it from day one and take it home the same day (white or black, cash or card).

Dispenser owners refill PFOS-free RO water at the owner rate of ¥80 per gallon (¥2,400 per 30 gallons) — that's ¥400 per 5-gallon bottle or ¥240 per 3-gallon bottle. Walk-in refills without a dispenser are ¥110 per gallon.