One Harmony is a loyalty program that is free to join and allows you to earn points and enjoy a variety of benefits every time you stay at Okura Hotels & Resorts, Nikko Hotels International, and Hotel JAL City in Japan and around the world. The program provides a wide range of benefits and privileges, and you can enjoy them by using the One Harmony app.

The first thing you need to do is download the One Harmony app on your smartphone or tablet. Once you're logged in, you can make a reservation, and search for a hotel to stay at.