Lake Sai (Fujikawaguchiko Town, Minamitsuru District, Yamanashi Prefecture)

Overview (history, characteristics, attractions)

Lake Saiko, one of the Fuji Five Lakes, is located at the northwestern foot of Mount Fuji in Fujikawaguchiko Town, Yamanashi Prefecture. The lake was created by ancient volcanic activity and lava flows, and the lakeside is charming for its quiet environment, with much of the natural beauty remaining untouched. The surrounding area is dotted with attractions such as the Aokigahara Jukai forest, lava caves (including ice caves and bat caves), and Lake Saiko Iyashi no Sato Nemba, a restored traditional thatched roof house.

Lake Saiko is characterized by its relatively quiet and tranquil atmosphere among the Fuji Five Lakes, making it an ideal place for nature experiences such as fishing, camping, cycling, and hiking. On clear days, Mount Fuji can be seen across the lake, and the scenery, illuminated by morning mist and sunsets, is popular with photography enthusiasts.

Highlights

• Lake Saiko Healing Village Nemba: An experiential tourist facility that recreates an old thatched-roof house. With craft experiences, souvenir shops, and restaurants, you can experience life in the past.
• Saiko Bat Cave (Saiko Bat Cave): One of the lava caves, the inside is cool. You can visit with light clothing, but be careful as it is slippery.
• Lakeside walks and cycling: There are promenades and circular paths along the lake, so you can enjoy Mount Fuji and nature from various angles by walking or cycling around the lake.
• Camping and fishing: There are campsites and bungalows scattered around the lake, making it a convenient base for outdoor activities. Bass fishing is also popular.
• Mount Fuji viewing spot: Especially on clear autumn and winter days, you can see the majestic Mount Fuji up close. The sunrise and sunset views are beautiful.

Access (nearest station, transportation, etc.)

• Train + BusFrom Tokyo, take the JR Chuo Main Line towards Otsuki, then transfer to the Fujikyuko Line towards Kawaguchiko (Kawaguchiko Station). From Kawaguchiko Station, take the Fujikyuko bus towards Lake Saiko and get off at the bus stop "Saiko Iyashinosato Nemba" or "Saiko Minami" (approximately 20-30 minutes, depending on the route).
• Express bus: Take the express bus from Shinjuku to Lake Kawaguchi and Fuji-Q Highland. After getting off at Lake Kawaguchi, take a local bus or taxi to Lake Saiko.
• car: Take the Chuo Expressway Kawaguchiko IC or Fuji Five Lakes Road. From Kawaguchiko IC or Fujiyoshida, take the national or prefectural road for about 20-30 minutes (depending on road and traffic conditions). Parking is available on the lakeside and at tourist facilities (fees may apply).
• Points to note: Public transportation may be less frequent at certain times and seasons, so please check the timetable in advance. In winter, roads may freeze in some places, so we recommend using chains or winter tires.

Estimated stay (estimated time required)

• Short tour (walking around the lakeside and taking photos): 1-2 hours
• Visit to Lake Saiko Iyashinosato Nemba + light meal: 2-3 hours
• Lava cave tour + lakeside activities (biking, boating, etc.): Half day (3-5 hours)
• If combining camping and hiking: 1 night or more (at least a full day)

Nearby spots

• Lake Kawaguchi (Lakeside Park, Oishi Park, etc.) — accessible by car or bus
• Aokigahara (Sea of Trees) — Walks and lava formations
• Narusawa Ice Cave and Fugaku Wind Cave (lava cave) — nearby cave sightseeing spots
• Fuji-Q Highland (Amusement Park) — Popular with families
• Lake Motosu (one of the Fuji Five Lakes) — Easy access by car, with a beautiful view of Mount Fuji across the lake
• Oshino Hakkai (Oshino Village) — Springs and old townscape sightseeing

Things to be aware of (crowds, manners, seasonal precautions, etc.)

• congestion: Parking lots and roads in the area can become congested during seasons when Mount Fuji is easily visible (clear days from autumn to winter, cherry blossom viewing season in spring, Golden Week, and summer vacation), as well as on weekends. Please allow plenty of time for your trip.
• Manners: As the area is largely a nature conservation area, please take your trash with you and use of fires is prohibited or restricted except in designated areas. Please follow the rules when using the campsite.
• safety: It is easy to get lost around Aokigahara Jukai, so avoid going off-trail and use a map or guide. The caves are dark and slippery, so bring a headlamp and comfortable shoes.
• Weather/Clothing: The lakeside is windy and can easily get cold. Please bring warm clothing, especially from autumn to spring. Even in summer, it can get chilly at night.
• natural environment: There are many insects (especially in the summer), so please bring insect repellent when hiking. In the winter, roads may freeze or snow may accumulate, and transportation and facilities may shorten their hours or close.
• Tourist facility opening hours: Opening hours vary depending on the facility and season, so please check the official website before visiting.

Lake Saiko is a relaxing tourist spot where you can enjoy the tranquil nature and the view of Mt. Fuji. Please plan your stay according to your purpose (strolling, experiences, activities, photography), and be mindful of safety and etiquette when visiting.