Lake Towada: Aomori's Deep Crater Lake

Explore Lake Towada, a deep volcanic caldera lake in Aomori and Akita, with its Oirase Stream walk, lake cruise, shrine, maiden statue and autumn color.

Published October 17, 2026 at 8:50 PM JST | By Tokyo Paul

Quick answer: Lake Towada is a deep caldera lake on the Aomori and Akita border, about 327 meters at its deepest, inside Towada-Hachimantai National Park. Visitors take the lake cruise, see the Statue of Maidens and walk the 14 kilometer Oirase Stream, which is at its best in autumn.

A Lake Born From a Volcano

Stand on the shore of Lake Towada on a still morning and the water looks like a sheet of dark glass, ringed by forested hills. What you are looking at is a caldera, the huge bowl left behind when a volcano collapsed after great eruptions. At roughly 400 meters above sea level, Lake Towada straddles the border between Aomori and Akita prefectures and sits inside Towada-Hachimantai National Park. This guide explains how the lake formed, what to see along its shore, how to walk the beautiful Oirase Stream, and how to plan a trip around the famous autumn colors.

The lake has long been one of Tohoku's signature scenic spots, but it still feels calm compared with more crowded destinations. There are no towering resort strips, just a handful of lakeside villages, a boat cruise and trails that lead into quiet woods. For travelers who enjoy nature, photography or slow walking, it is hard to beat.

How the Caldera Formed

Lake Towada fills the crater of a large volcano, formed through several eruptions over tens of thousands of years. The caldera is about 11 kilometers across, and its current shape was completed later when lava domes inside it collapsed. The result is a double-crater lake with a rugged, scalloped shoreline and a circumference of about 46 kilometers. It has a surface area of around 61 square kilometers, making it the twelfth largest lake in Japan.

It is also remarkably deep. The greatest depth is about 327 meters, and the average is around 71 meters, which gives the water its dark blue, mirror-like look. The lake has just one natural outlet, the Oirase River, which flows from the shore at Nenokuchi down toward the Pacific side of northern Honshu. In 1936 the lake and its surroundings were included in the national park that protects this part of Tohoku.

Lakeside Sights: Maidens and a Quiet Shrine

The lake's best-known landmark is the Statue of Maidens, a bronze sculpture of two standing women by the celebrated artist and poet Takamura Kotaro. Completed in 1953, it stands on the shore in the Yasumiya area and has become a symbol of Lake Towada. Many visitors stop here first, since it is close to the boat pier and local shops, and the pose of the two figures against the water makes for lovely photographs in any weather.

Not far away on the Nakayama peninsula is Towada Shrine. According to a legendary account, the general Sakanoue Tamuramaro founded a small shrine here in the year 807, dedicated to the hero Yamato Takeru. Whatever its precise origins, the shrine's setting among tall trees on the lakeshore gives it a peaceful, almost timeless feel. A short walk through its grounds is a nice way to slow down before or after a cruise.

The lake cruise is the other classic activity. Sightseeing boats link Yasumiya and Nenokuchi, the starting point of the Oirase Stream, letting you see cliffs, small islands and bays that are hard to reach on foot. The service is seasonal and generally pauses in winter, so check the operator's timetable. Seen from the water, the scale of the caldera becomes much clearer than from the road. The ride is also a relaxed way to rest your legs between walks, with open decks that make it easy to watch the shoreline change from forest to cliff and back again. Early in the day, when the surface is calmest, the reflections of the surrounding hills can be especially striking.

Walking the Oirase Stream

The Oirase Stream is probably the single most beloved walk in this region. The stream runs about 14 kilometers from Nenokuchi at the lake down to Yakeyama, and a footpath follows it at water level for much of the way, shaded by beech and maple trees and mossy rocks. Along the route you pass rapids and a series of waterfalls, including Ashura-no-Nagare, a famous stretch of tumbling water, and Choshi Otaki, the largest fall on the main stream at about 7 meters high and 20 meters wide.

Walking the whole route takes about five to six hours, but many visitors choose a shorter section, such as the stretch between Ishigedo and Choshi Otaki, which is a few kilometers and takes about two hours. The path is mostly gentle, but it can be muddy and slippery after rain, so shoes with good grip are worthwhile. Cafes and restrooms are limited and mostly clustered around Ishigedo, Nenokuchi and Yakeyama, so bring water and a snack.

A good plan is to walk downstream, because the path follows the water so gently that the going feels easy, and to check the bus timetable beforehand so you know how to get back. Because the stream is quiet and the path hugs the water, it is a lovely place for photography and for simply listening to the flow. Fresh green leaves brighten the stream in late spring, and in winter frozen waterfalls appear, though winter walking calls for extra preparation.

Autumn Color and Practical Tips

Autumn is the most popular season here, and for good reason. Leaves along the Oirase Stream usually begin changing around mid October and often peak in the second half of the month, with color moving downstream from the lake. Weekends in the foliage season can be busy with road traffic, so weekday mornings are the most relaxing time to go. Local authorities sometimes limit private cars on certain days in peak weeks, so it is wise to check the latest traffic information from the tourism office.

There is no railway to the lake, so travel is by bus or car. Seasonal JR buses connect the area with Aomori and Hachinohe, taking a couple of hours or more, and services are infrequent. A rental car is the most flexible choice if you plan to combine the lake, the stream and nearby areas, but always confirm return bus times in advance if you rely on public transport. Mobile reception can be patchy in the mountains, so save maps and timetables before you set out.

Bring layers, because mountain weather can change quickly, and a light waterproof jacket is useful in any season. A small towel for wiping a camera lens and a thermos of something warm will be appreciated on cool mornings. Stay on marked paths, take your trash with you, and be considerate when stopping to photograph, so other walkers can pass.

Quick Takeaways

Lake Towada rewards a visit in almost any season, but it is at its most memorable when the leaves turn. Give yourself time to see the Statue of Maidens, take the cruise, and walk at least part of the Oirase Stream. Check bus timetables, car restrictions and boat schedules before leaving, and aim for weekday mornings if you want a quieter experience. With solid shoes, a few layers and a flexible plan, this deep crater lake in the north is easily one of Tohoku's most satisfying outings.

Frequently Asked Questions

How deep is Lake Towada?

Lake Towada reaches about 327 meters at its deepest point, with an average depth of around 71 meters. It fills a volcanic caldera and has a surface area of roughly 61 square kilometers, making it the twelfth largest lake in Japan.

How long does it take to walk the Oirase Stream?

The full path from Nenokuchi to Yakeyama is about 14 kilometers and takes roughly five to six hours. Many visitors walk a shorter section, such as Ishigedo to Choshi Otaki, which takes about two hours.

When is the best time to see autumn colors at Lake Towada?

Leaves along the Oirase Stream usually begin changing around mid October and often peak in the second half of the month. Weekday mornings are calmer than weekends, and it is wise to check local traffic and bus information before you go.

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More guides from Tokyo Paul: Yamadera: Yamagata's Mountain Temple of a Thousand Steps, Kakunodate: Akita's Samurai Streets and Weeping Cherries and Lake Tazawa and Nyuto Onsen: Akita's Hot Spring Highlands.