Hotel Tokaien (Nishiura-cho, Gamagori City, Aichi Prefecture), a hotel offering 360-degree panoramic views of Mikawa Bay, is holding "Rainy Season Weeks" from June 1 to June 30, 2026. The month-long event celebrates Japan's rainy season and centers on a collaboration with Katahara Onsen's Ajisai no Sato (Hydrangea Village), combining a special night tour with a seasonal ajisai-themed kaiseki dinner course.
Night Tour to Katahara Onsen's Ajisai no Sato
Katahara Onsen's Ajisai no Sato is widely regarded as one of the finest hydrangea viewing spots in the Tokai region, with approximately 50,000 hydrangea plants in bloom each June. During the Ajisai Festival (June 1–30), the grounds are lit up at night for a striking evening display, and visitors may also spot the glowing flight of Genji fireflies.
Hotel Tokaien offers a complimentary shuttle service with admission ticket for guests staying on the collaboration plan, running on selected dates from June 8 to June 30.
Free shuttle dates: June 8–30, Monday–Thursday
- Departure from hotel: 7:30 PM
- Return to hotel: 8:45 PM
Times may vary depending on road conditions.
"Iro" Ajisai Kaiseki Dinner
The dinner served during Rainy Season Weeks is a special course called the "Iro" (彩, meaning "color") Ajisai Kaiseki, which weaves in the seasonal beauty of hydrangeas from starter through to dessert. One of the standout dishes is "hikizuri nabe," a Mikawa chicken hot pot cooked on an iron plate modeled after the region's Sanshuu ceramic tiles — one of the most popular menu items. The course also features hydrangea-motif desserts crafted with Mikawa's regional ingredients.
The "Iro" Ajisai Kaiseki is also available for day visitors without an overnight stay.
Wood Deck Events at Blue Ocean Terrace
At the hotel's Blue Ocean Terrace overlooking Mikawa Bay, guests can enjoy toasted marshmallows at an outdoor fireplace and the hotel's original "Iro" Violet Fizz cocktail. Both are complimentary for guests who follow the hotel on social media.
Bar the Ocean @BizCafe (Saturday Nights)
On Saturday nights during the event period, the hotel opens a pop-up bar called "Bar the Ocean @BizCafe." Guests can order from the hotel's original "Iro" cocktail series — featuring hues inspired by hydrangeas — alongside snacks, mini pizza, and half-ramen with special char siu from local butcher Torikura (available at an extra charge). During Rainy Season Weeks, all guests receive a complimentary voucher for one "Iro" cocktail at check-in.
Collaborative "Iro" Hydrangea Collage
Throughout the event period, staying guests are invited to contribute to a shared "Iro" hydrangea collage artwork displayed in the hotel. Updates are shared on social media.
About Hotel Tokaien
Hotel Tokaien sits on a hillside in Nishiura-cho with stunning views of Mikawa Bay. All guest rooms face the ocean, and the hotel features a main lobby with panoramic bay views, a large public bath fitted entirely in marble and hinoki cypress, and a 10th-floor Sky Lounge with a sweeping 360-degree view of Mikawa Bay.
Event Overview
- Period: June 1–30, 2026
- Venue: Hotel Tokaien, Oyama, Nishiura-cho, Gamagori City, Aichi Prefecture
- Ajisai Festival: Katahara Onsen Ajisai Festival (approximately 10 minutes by car)
- Hotel website: Hotel Tokaien
Collaboration stay plan (example):
June limited – standard rates apply on Saturdays too ◆ With admission ticket & free shuttle on selected dates ◆ Genji fireflies & hydrangeas: Early Summer Delight Plan
Access:
- Train: Approximately 5 minutes by car from Meitetsu "Nishiura Station" (shuttle available with advance booking)
- Car: Approximately 35 minutes from Tomei Expressway "Otowa Gamagori IC" or "Okazaki IC"
- From major cities: Approximately 2 hours 30 minutes from Tokyo Station; approximately 2 hours 10 minutes from Shin-Osaka Station (both by Shinkansen)
Nearby Attractions
- Katahara Onsen Ajisai no Sato (approximately 10 minutes by car) — The Tokai region's top hydrangea spot with around 50,000 plants; popular for night illuminations and Genji fireflies
- Nishiura Engawa Park (within walking distance) — An elevated viewpoint with beautiful views of Mikawa Bay, great for evening strolls
- Nishiura Palm Beach (within walking distance) — A sandy beach popular for walks in spring and autumn, and swimming in summer
- Nishiura Clam Digging (within walking distance) — Seasonal clamming on the Nishiura shore, popular with families
- Takeshima Island (approximately 20 minutes by car) — A nationally designated natural monument with Yaotomi Shrine and scenic walking paths
- Laguna Ten Bosch (approximately 25 minutes by car) — A complex featuring shopping, hot springs, and attractions
- Toyotomi Hideyoshi NHK Taiga Drama Museum (approximately 40–50 minutes by car) — Tied to a currently airing historical drama; popular with history enthusiasts and families
- Ghibli Park (approximately 60–80 minutes by car) — A large facility offering the world of Studio Ghibli; popular with couples, families, and international visitors
