Kappa Tengoku - An outdoor tattoo-friendly hot spring in Kanagawa, Kanto

You get what you paid for (I know it's one of the lowest charge for onsen). It was advertised for 800 yen but we were charged 900 yen admission, additional 200 yen for a small towel (make sure you bring your own bath towel with you). The facility is very old and the atmosphere inside the osen is just OK. The locaation is convenient, it's just a 5 min walk/incline from the Hakone/Yumoto station.

No frills onsen right by the train station. It was largely empty on a saturday. The bath was hott and water was very fresh. Price was great with towel rental and two 100jpy lockers. Great shirts with their funny character. For a day trip, it was perfect!

The location is conveniently next to Hakone Station, meaning it is easy to go before travelling. Wonderful experience and very good price (¥900 + optional ¥300 for towel rental). Lockers are available and require ¥100 coins to operate, which are returned after use.