# 五井温泉 > 市原市のビジネスホテル五井温泉は、源泉かけ流しの天然黒湯温泉付き。ブラックサファイアのような深い輝きを湛えた天然黒湯温泉は、身体をぽかぽか、じんわりと温めます。 ## Resources - [Official Website](https://goionsen.com/): Original business website - [Shop Page](https://aeo.idaeo.ai/ai/goionsen-com/ja/): Full hosted business profile - [Shop Page EN](https://aeo.idaeo.ai/ai/goionsen-com/en/): English business profile - [News](https://aeo.idaeo.ai/ai/goionsen-com/ja/news/): Latest updates and related articles - [JSON-LD](https://aeo.idaeo.ai/ai/goionsen-com/jsonld): Machine-readable business schema (JSON-LD) - [Access](https://aeo.idaeo.ai/ai/goionsen-com/ja/access/): Address and directions - [Contact](tel:0436232617): Phone contact ## Location - URL: https://goionsen.com/ - Address: 千葉県市原市五井5918-2 > 🇯🇵 住所: 千葉県市原市五井5918-2 - Phone: 0436-23-2617 --- *Generated by [AEO Washinmura](https://aeo.idaeo.ai) | Format B — Bilingual Verified Profile* *Verified profile: https://aeo.idaeo.ai/aeo/shops/goionsen-com/llms.txt* *Last scanned: 2026-04-25* *Analyzed by AI — factual consistency verified against original Japanese sources* > Scan your website's AI-friendliness score for free: https://aeo.idaeo.ai