In 1923, to celebrate the imperial visit of Crown Prince Hirohito, the bathhouse was extended at a cost of ￥ 17,000 into a particularly artful blend of Western and Japanese styles. This was a milestone in the development of Peitou, and is the most representative example of Taiwan's hot-spring architecture.
一九二三年，又為了當時日本裕仁皇太子的大駕光臨，再度花費一萬七千圓擴大增建，使得這一座和洋相融、造型特殊浪漫的浴場，成為北投溫泉發展的里程碑，也是台灣最具代表性的溫泉建築。