Spa Metssa Otaka’s Dragon Sauna: Is the Hourly Löyly Worth Waiting For?

Updated September 2026

At Spa Metssa Otaka in Nagareyama, the Dragon Sauna has five HARVIA heaters. One runs an automatic löyly cycle every ten minutes; at the top of each hour, all five start together for the signature Dragon session. That hourly burst is memorable, but it is only one part of a large bathing facility with two other saunas, several cooling options and natural hot-spring baths.

If your visit is short, there is no need to build the whole schedule around the clock. Try an ordinary Dragon cycle or the smaller medi sauna first. When you know how the heat feels, you can decide whether the next hourly session is worth timing.

Three rooms, three different rhythms

Dragon Sauna is the large, four-level room, with about 36 seats listed in the 2022 opening release. The regular ten-minute cycle means you can experience its automated löyly without arriving exactly on the hour. The synchronized five-heater session is the showier version, and may draw more people.

The medi sauna is smaller and quieter, with self-löyly. It suits a slower visit where you want to focus on the steam rather than find a place before a timed event. The moist salt sauna is different again, with mist, salt and a mud pack. It is not another high-temperature room to rank against Dragon.

The Dragon room is arranged over four levels, with about 36 seats listed in the facility’s 2022 opening release. Its regular cycle runs every ten minutes; the hourly all-heater burst is an extra spectacle, not the only way to get the room’s automatic steam.

The bath areas are gender-separated, so couples and mixed groups will not share these sauna rooms. You can meet again in the dining or common areas, or in the separately ticketed mixed-gender bedrock-bath lounge.

The 157 cm plunge is a depth measurement

One of the cold baths is 157 cm deep. The number describes water depth, not temperature or the depth of the hot-spring source. A standing plunge lets more of the body enter the water, but it does not suit every height or comfort level. Check the steps and handholds and enter gradually; there is no need to force a full-body dip.

Other cold baths provide different levels of chill. The men’s area includes the Metsä cold plunge, listed below 10°C. Cooling off is optional, and a cooler or warmer bath—or simply resting in the open air—may feel better than an intense temperature change.

Natural spring is only one part of the bathing menu

The facility has natural hot-spring baths alongside artificial carbonated and other functional pools. The “15 baths” count covers different types of bathing, not 15 natural-spring pools. The current public pages do not provide a complete source analysis or a treatment table for every bath, so specific spring chemistry, source temperature and circulation details should not be inferred from the cold-bath figures.

For a compact first visit, allow around 90 minutes: wash and settle in, use one sauna, take a break, then decide whether to catch one Dragon session or spend the remaining time in the baths. A longer stay can include the paid bedrock area, which has six heat rooms, more than 15,000 books and manga, Wi-Fi and work seats in the shared lounge.

Early hours, entry and tattoo policy

Weekday admission before 9 a.m. has been listed at ¥950, compared with ¥1,100 for regular weekday admission. Weekend, holiday and special-day prices can differ, so check the facility’s current hours and fees before going.

The early-bird ticket is useful for a short morning visit, but it does not change which baths are available. The separately priced bedrock area has six heat rooms, more than 15,000 books and manga, Wi-Fi and work seats; allow enough time to use it rather than buying it as an afterthought.

The west exit of Nagareyama Otakanomori Station is about a two-minute walk away. It is an easy rail stop from the Tokyo side of Chiba, with no shuttle connection to plan.

The natural spring is only one element in a menu the facility describes as 15 bathing types. Several are functional or artificial baths, not separate natural springs. Its public pages do not offer a full current source-analysis sheet or a treatment breakdown for every pool, so the 157 cm figure should be read strictly as cold-pool depth—not as evidence about source depth or hot-spring chemistry.

Tattoos are generally not allowed, but the facility lists a narrow cover-sticker exception: up to two of its 9.5 by 14 cm stickers may be used if they completely cover the tattoo. The current facility guidance should be checked before travel, especially if you need to know availability or the sticker price.

The stickers are sold by the facility, and the opening-era guide lists them at ¥300 each. Since price and availability can change, confirm both before relying on the exception; if two stickers cannot cover the full design, entry is not allowed.

If you want more of an all-day rest-and-reading setup than a sauna-focused visit, Yuneru at Shin-Narashino has a different mix of cabins, manga and bedrock bathing. For a bay-side spring bath, Makuhari Yuraku no Sato puts the outdoor view first.

Sources

- [Spa Metssa Otaka: sauna and cold baths](https://www.ryusenjinoyu.com/spametsaotaka/sauna/), [concept](https://www.ryusenjinoyu.com/spametsaotaka/concept/) and [baths](https://www.ryusenjinoyu.com/spametsaotaka/ofuro/) - [Hours and prices](https://www.ryusenjinoyu.com/spametsaotaka/info/) and [FAQ](https://www.ryusenjinoyu.com/spametsaotaka/faq/) - [Oakland Kanko Kaihatsu / PR TIMES: 2022 opening release](https://prtimes.jp/main/html/rd/p/000000015.000030467.html)

Checked September 27, 2026.