Lake Tazawa (Tazawako): Japan's Deepest Lake & the Tatsuko Legend

Why Lake Tazawa Is Japan's Most Remarkable Lake

Lake Tazawa (田沢湖, Tazawako) sits in the mountains of Semboku City, Akita Prefecture, holding the title of Japan's deepest lake at 423.4 meters (1,388 feet). That depth — roughly four times deeper than Lake Biwa — gives the water an extraordinary sapphire-to-jade hue that shifts with the sunlight and seasons. This is one of Akita's lake destinations that rewards the journey north.

The lake formed roughly 1.4 million years ago when a volcanic caldera collapsed and filled with water. Its depth means it never freezes, even during Akita's famously harsh winters when snow piles meters high around the shore. With a circumference of about 20 km, it is compact enough to cycle in a morning yet deep enough to hold mysteries — including the legend of a maiden who became a dragon.

The Tatsuko Legend and the Golden Statue

The most visible landmark at Lake Tazawa is the golden Tatsuko statue (辰子像) on the western shore. Unveiled in 1968 by sculptor Yasutake Funakoshi, the figure depicts a young woman from local legend who drank from the lake's waters seeking eternal beauty — only to be transformed into a dragon condemned to live beneath the surface forever.

The statue faces away from the water, a detail that captures the tragedy of the story. It is free to visit at any time and takes about 10-15 minutes to walk around the viewing area. In the right light, the golden figure against the blue water makes for one of Tohoku's most striking photographs.

Nearby, Gozanoishi Shrine (五去ノ石神社) enshrines Tatsuko and features a red torii gate overlooking the lake. According to the Semboku City tourism site, the shrine is free to visit year-round. Combined, the statue and shrine make a pleasant 30-60 minute lakeside walk from the bus stop.

Lakeside Activities: Cycling, Boats, and Swimming

Cycling the 20 km Lakeside Circuit

The road circling Lake Tazawa covers about 20 km and is one of the most scenic cycling routes in Tohoku. The terrain has moderate hills, so many visitors on TripAdvisor strongly recommend renting an electric bike over a standard one. Rental shops operate near Tazawako Station and along the lakefront, with prices around ¥1,000-2,000 (~$7-13) for 2-3 hours based on 2024 rates. The circuit takes about 1.5-2 hours at a relaxed pace, with stops at the Tatsuko statue, Gozanoishi Shrine, and several viewpoints along the way.

Rentals are available roughly from April through November. Check availability closer to your visit, as winter closures apply.

Pleasure Boat Cruises

Pleasure boats operate on the lake from approximately April through November, offering 30-minute cruises for about ¥1,200 (~$8) per adult based on 2024 rates. According to the Tazawako Tourism Association, reservations are recommended during peak summer season. The cruise passes close to the Tatsuko statue and gives you a sense of the lake's scale from the water.

Prices shown are from 2024; check the official site for current schedules and rates.

Summer Swimming and Paddleboarding

Lake Tazawa has a public beach area open roughly from June through September. The water is remarkably clear, but be prepared — even in midsummer, the temperature is cool due to the lake's extreme depth. Paddleboard rentals have become available in recent years near the main beach area.

Season-by-Season Guide to Lake Tazawa

Summer (June–September)

This is the most active season: swimming, cycling, boat cruises, and paddleboarding are all available. Temperatures are pleasant by Tohoku standards, though afternoon rain showers are common. Weekdays are significantly less crowded than weekends.

Autumn Foliage (Mid-October)

The mountains ringing the lake turn vivid red and gold, usually peaking around mid-October. The combination of autumn colors reflected in the deep blue water is considered one of Akita's top foliage spots. Cycling the circuit during foliage season is particularly rewarding.

Winter and Spring

In winter, heavy snow blankets the shoreline while the lake itself remains unfrozen — a surreal contrast. Most water-based activities shut down from November through March, but the snow scenery is dramatic. Tazawako Ski Area operates nearby for those who want winter sports. Spring cherry blossoms appear along the shore in late April to early May.

Season	Highlights	Activities Available
Summer (Jun-Sep)	Swimming, clear skies	Cycling, boats, paddleboarding, swimming
Autumn (Oct)	Peak foliage	Cycling, boats, photography
Winter (Nov-Mar)	Snow scenery, unfrozen lake	Skiing nearby, sightseeing
Spring (Apr-May)	Cherry blossoms	Cycling, early-season boats

Getting to Lake Tazawa

The nearest station is JR Tazawako Station on the Akita Shinkansen line. From Akita City, the shinkansen takes about 1 hour. From Tokyo Station, the Komachi shinkansen reaches Tazawako in approximately 3 hours. Fares vary by season and seat type — check JR East for current pricing, and note that the Japan Rail Pass covers this route.

From Tazawako Station, the Tazawako Loop Bus reaches the lakefront in about 15 minutes. The bus runs along the lakeside with stops at key points including the Tatsuko statue. Check the bus schedule and fares at the station information desk.

If driving, the lake is about 1 hour from Akita Airport with parking available at several lakeside spots.

For detailed Tazawako Station travel logistics and nearby onsen, see our dedicated guide.

Route	Transport	Duration
Tokyo → Tazawako	Akita Shinkansen (Komachi)	~3 hours
Akita → Tazawako	Akita Shinkansen	~1 hour
Tazawako Station → Lake	Loop Bus	~15 min

Practical Tips for Your Visit

• Budget half a day minimum: cycling the lake plus the Tatsuko statue and shrine takes 2-3 hours. Add time for a boat cruise or swimming if visiting in summer.
• Rent an e-bike: the hills around the circuit are moderate but tiring on a regular bike, especially in summer heat. Many visitors on TripAdvisor flag this as their top recommendation.
• Check weather before cycling: sudden rain is common, especially in summer. The circuit has limited shelter.
• Combine with Kakunodate: the famous samurai town is just 20 minutes from Tazawako Station by train, making a natural pairing for a full-day Akita trip.
• Bring layers in shoulder seasons: even in September and May, lakeside temperatures drop noticeably in the afternoon.

Frequently Asked Questions

How long does it take to cycle around Lake Tazawa?

The lakeside circuit is approximately 20 km with moderate hills. Budget 1.5-2 hours on a regular bike, or about 1 hour on an electric bike. E-bike rentals are available near Tazawako Station and at lakeside shops for around ¥1,000-2,000 (~$7-13) for 2-3 hours.

Can you swim in Lake Tazawa in summer?

Yes. A public beach area operates roughly from June through September with free entry. The water is exceptionally clear, but expect it to be cool even in midsummer — the lake's 423-meter depth keeps temperatures well below what you might expect.

How much does a boat cruise on Lake Tazawa cost?

About ¥1,200 (~$8) per adult for a 30-minute cruise, based on 2024 rates. Boats operate seasonally from approximately April through November. Reservations are recommended during peak summer. Check the tourism association site for current schedules.

What is the best time to visit Lake Tazawa?

Summer (June-September) is ideal for water activities, swimming, and cycling. Mid-October offers spectacular autumn foliage reflected in the blue water. Weekdays are far less crowded year-round. Winter visitors see dramatic snow scenery, though most activities are closed.

Is the Tatsuko statue worth visiting?

Yes. The golden statue on the western shore is the lake's most iconic photo spot and takes only 10-15 minutes to view. Pair it with nearby Gozanoishi Shrine for a 30-60 minute lakeside walk that captures the legend and scenery of Lake Tazawa.