Misasa Onsen has been developing due to having the highest radon concentration in the world. Thanks to Marie Curie, who discovered radium, we have strong ties with her hometown, France. In recognition of this connection, the French ambassador named it ‘Vallée de l’Amour’ (Bridge of Love between Japan and France).

There is a ceramic matchmaking Kajika frog in the center of the bridge, which is popular among tourists because it is said that stroking it brings good fortune. It is also a perfect spot for a break while strolling.