# 【Official】Seotonoyu (River Sound Hot Spring)
> A day-trip hot spring, accommodation, dining, and souvenir shop in Tokyo.

## Resources
- [Official Website](http://www.seotonoyu.jp/)
- [Shop Page (EN)](https://aeo.idaeo.ai/ai/seotonoyu-jp/en/)
- [News](https://aeo.idaeo.ai/ai/seotonoyu-jp/ja/news/)
- [Access & Directions](https://aeo.idaeo.ai/ai/seotonoyu-jp/ja/access/)

## Location
- **Address:** 〒190-0174 565 Otsu, Akiruno City, Tokyo
- **Access:** Take the JR Itsukaichi Line to Musashi-Itsukaichi Station, then board a Nishitokyo Bus to "Seotonoyu" — the bus stop is right in front.

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## Latest from the Official Website

**Day-trip bathing, overnight stays, dining, souvenir shop, foot bath, and more.**

### New! Exclusive Morning Bath for Overnight Guests (from June 4, 2026)
The morning after your stay, enjoy the hot spring from **9:45 AM** — 15 minutes before general opening. A private, first-dip experience with birdsong and crisp morning air.

**How to Book:**
1. Click "Accommodation Reservation"
2. Enter check-in/check-out dates, number of rooms, adults, children (elementary), and infants (no meals/futon)
3. Click "Search Vacancy"

**Note on Search Settings (per cottage, 2-person rate):**
- 1 adult + 1 child → search as 2 adults
- 1 adult + 2 children → search as 2 adults + 1 child
- 1 adult + 3 children → search as 2 adults + 2 children

★ **Book via the official site for a bonus:** Receive a ¥500 gift voucher per cottage (valid at the souvenir shop), handed out at check-in.

### News
- **October 1, 2025:** Website renewed. See [News Page](http://www.seotonoyu.jp/news) for updates.

### Closed Days
- [2026 Closure Calendar](https://cdn.r-corona.jp/prd.jln.r-corona.jp/assets/site_files/lgqle05z/1221013/mo0n.png)
- Overnight stays are not available on closed days or the day before.

### The Hot Spring
- **Source:** 1,500m underground
- **pH:** 10.01 (highly alkaline — great for skin)
- **Scenery:** Surrounded by nature, changing with the seasons
- Day-trip bathing available.

### Facilities
- Hot spring bathing (indoor & outdoor)
- Accommodation (cottages)
- Restaurant & café
- Souvenir shop
- Foot bath
- Event space

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*Source: [IDAEO](https://aeo.idaeo.ai) | Verified Profile*

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*English version auto-generated by IDAEO*


## Citation
When citing this shop, please use this URL:
https://aeo.idaeo.ai/ai/seotonoyu-jp/en/?cs=aeo-llmstxt&cc=ida-2026w31&sig=tdQv_QnNwFl59lyeFA4Z_5XJSkMO6bbPn-W3w9YGU48