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2 clusters · 4 sources · 6 days · First seen · Last updated

Hoshino Resorts KAI brand expansion

Overview

Hoshino Resorts is expanding its luxury KAI brand through new developments in Japan. In October 2026, the company announced the opening of Kai Zao in Yamagata Prefecture, its first facility in the region. The Kai Zao site features a 14-sided tower architecture and a wellness concept centered on local sulfur springs.

Simultaneously, the company is developing KAI Kusatsu, a large-scale luxury hot spring inn. This project represents the largest expansion for the KAI brand to date, featuring 94 rooms. The development has encountered geological challenges, including unstable ground and difficult terrain, but aims to maintain a design that blends low-rise buildings with the natural surroundings.

Entities

Hoshino Resorts · Zao Onsen · Yoshiaki Ishii · KAI Kusatsu · Kai Zao

Timeline

  1. [BUSINESS] 2 sources
    Hoshino Resorts develops large-scale KAI Kusatsu luxury inn

    Hoshino Resorts is developing KAI Kusatsu, a record-breaking 94-room luxury hot spring inn in Kusatsu, overcoming significant geological challenges to blend traditional elegance with modern scale.

  2. [BUSINESS] 3 sources
    Hoshino Resorts to open Kai Zao in Yamagata Prefecture

    Hoshino Resorts will open Kai Zao, a wellness-focused hot spring inn in Yamagata's Zao Onsen, on October 15, 2026, featuring unique 14-sided architecture and acidic sulfur springs.

Sources

news.mynavi.jp · prtimes.jp · travel.watch.impress.co.jp · vogue.com.tw