Ōkawasō, located in Fukushima, is a charming onsen ryokan (hot spring inn) that offers a peaceful retreat in the heart of nature. It is especially recommended for foreign tourists who seek a tranquil atmosphere and enjoy hot spring baths. Additionally, the ryokan has become famous for its resemblance to the “Infinity Castle” from the anime Demon Slayer (Kimetsu no Yaiba).

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1. Room Features

The rooms at Ōkawasō are traditionally styled with tatami mats and sliding paper doors, offering a calm and relaxing atmosphere. You can enjoy the soothing sounds of nature and experience the beauty of the changing seasons through the windows.

2. Onsen (Hot Springs)

Ōkawasō’s onsen is a natural, sulfur-rich hot spring with a constant flow of fresh water. There are separate indoor baths for men and women, as well as outdoor baths where you can relax while surrounded by nature. The hot springs are known for their skin-beautifying effects and relaxation benefits.

3. Day-Use Bathing

Ōkawasō also welcomes visitors for day-use bathing. Here are the details:

• Operating Hours: 11:00 AM to 3:00 PM (last bath acceptance is until 2:00 PM)
• Fees:
  • Adults (Middle school age and above): ¥1,500 (including tax)
  • Children (3–12 years old): ¥680 (including tax)
• Amenities: A face towel is provided.

You can enjoy the indoor and outdoor baths during your visit, offering a luxurious experience even for day guests.

4. Access

Ōkawasō is located approximately 30 minutes by car from Koriyama, Fukushima. There is also a shuttle service available from nearby stations. Surrounded by nature, it provides a peaceful environment away from the hustle and bustle of the city.

5. Resemblance to “Infinity Castle” from Demon Slayer

Ōkawasō is not an official location from Demon Slayer, but its architecture has gained attention for resembling the “Infinity Castle” featured in the anime. The ryokan features a grand lobby with an open atrium and a staircase that leads to an “floating stage” where shamisen performances are held. This unique design has become popular among anime fans, who appreciate the resemblance to the iconic setting in Demon Slayer.

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This version highlights the unique atmosphere at Ōkawasō that reminds fans of the “Infinity Castle” in Demon Slayer. Enjoy your stay in a peaceful, beautiful environment with an added touch of anime-themed charm!

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