My visit to Arima Onsen was a very comfortable and convenient experience overall.
Tickets can be purchased online in advance, and you'll receive an e-ticket immediately after ordering, avoiding queues and at a lower price than buying on-site, which is a great benefit for travelers.
Upon entry, you'll get your own locker and a personal card number. All purchases for meals, souvenirs, or additional services within the facility are made by scanning this card, and you settle the bill all at once when you leave. The process is very smooth.
After receiving your card, you can head to the clothing area to choose a yukata in your preferred color. Once changed, you go downstairs to wash and enjoy the hot springs. There are both indoor and outdoor hot springs; the outdoor one is particularly relaxing and comfortable.
After soaking in the hot springs, there's also a lounge area with sofas where you can lie down, rest, or even take a nap. You can also read the manga provided by the facility. The entire space is very relaxing, and it feels like you could easily spend the whole day there.
Additionally, you can pay to experience fish therapy, bedrock baths, massages, or dine inside, offering many choices.
Regarding transportation, you can take a bus from Kobe city center. The last bus from Arima Onsen back to the city center is at 6:00 PM, with buses running approximately every 30 minutes. Remember to keep track of the time.
If your itinerary isn't rushed, I highly recommend setting aside time to visit Arima Onsen and truly relax.