(Translated by https://www.hiragana.jp/)
Onsen - Wikipedia
Wikipedia

Onsen

In Japan, onsen (温泉おんせん) are hot springs and the bathing facilities and traditional inns around them. There are approximately 25,000 hot spring sources throughout Japan, and approximately 3,000 onsen establishments use naturally hot water from these geothermally heated springs.[1]

Outdoor onsen at Nakanoshima in Nachikatsuura, Wakayama
A video showcasing the stool and shower used for cleaning off, an inside pool and an outside pool

Onsen may be either outdoor baths (露天風呂ろてんぶろ or 野天風呂のてんぶろ, roten-buro / noten-buro) or indoor baths (内湯うちゆ, uchiyu). Traditionally, onsen were located outdoors, although many inns have now built indoor bathing facilities as well. Nowadays, as most households have their baths, the number of traditional public baths has decreased,[2] but the number and popularity of hot spring resort towns (温泉おんせん街がい, onsen-gai) have increased since the end of Second World War.[3] Baths may be either publicly run by a municipality or privately, often connecting to a lodging establishment such as a hotel, ryokan, or minshuku.

Indoor onsen at Asamushi Onsen

The presence of an onsen is often indicated on signs and maps by the symbol ♨, the kanji 湯ゆ (yu, meaning "hot water"), or the simpler phonetic hiragana character ゆ (yu).

Definition

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According to the Japanese Hot Springs Act (温泉おんせん法ほう, Onsen Hō), onsen is defined as "hot water, mineral water, and water vapor or other gas (excluding natural gas of which the principal component is hydrocarbon) gushing from underground".[4] The law states that mineralized hot spring water that feeds an onsen must be at least 24 °C (75 °F) originating at a depth of at least 1.5 kilometres (0.93 mi), and contain specified amounts of minerals such as sulphur, sodium, iron, or magnesium.[1]

When onsen water contains distinctive minerals or chemicals, establishments often display what type of water it is,[5] in part because the specific minerals found in the water have been thought to provide health benefits.[6] Types include sulfur onsen (硫黄いおう泉いずみ, iō-sen), sodium chloride onsen (ナトリウム泉いずみ, natoriumu-sen), hydrogen carbonate onsen (炭酸泉たんさんせん, tansan-sen), and iron onsen (鉄泉てっせん, tetsu-sen).

History

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Exactly when humans first began bathing in onsen in Japan is unknown, but historical records show it has a history of at least about 1,300 years.[7][8] Many of the earliest records of onsen bathing document Japanese Emperors or members of the imperial family staying at onsen for long periods of time. At the time, onsen were thought to be sacred and to have healing properties.[9] It is now believed those who traveled to onsen in these early records were seeking cures to disease or other ailments by bathing in the onsen water.[8] This ancient practice of bathing in onsen to cure illnesses, often for long periods such as a week, is referred to as tōji (湯治とうじ).[10] Some of the oldest onsen in Japan are considered to be Dogo Onsen in Ehime Prefecture, Shirahama Onsen in Wakayama Prefecture, and Arima Onsen in Hyogo Prefecture.[7]

Until around the Edo period, onsen had close religious ties to Buddhism with temples often being built near onsen sources.[8][9] During the Edo period, however, onsen began to gain popularity among the general population thanks in part to depictions of the hot springs in ukiyo-e.[8][9] It is also during this period that the use of onsen shifted from being primarily for religious and healing reasons to being used for bathing for cleanliness and socializing.[11][12]

In modern times, traveling to hot spring resort towns (温泉おんせん街がい, onsen-gai) is a popular form of domestic tourism in Japan.[3] During the bubble economy of the 1980s, there was a "onsen boom."[3] Although the number of overnight guests at hot spring resorts has decreased slightly since the boom, travel to such onsen towns as a relaxing getaway is still popular among Japanese people.[3][12]

Mixed bathing

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Guidebook to Hakone from 1811

Traditionally, men and women bathed together at both onsen and sentō communal bathhouses, but gender separation has been enforced at most institutions since the opening of Japan to the West during the Meiji Restoration.

Mixed bathing (混浴こんよく, kon'yoku) is currently banned in Japanese public baths.[13][14][a][16] Depending on the prefecture and local ordinances, children seven years old and younger may be exempt from this ban.[13]

Private onsen called "family baths" (家族かぞく風呂ふろ, kazokuburo) can be found in many locations throughout Japan. These can be reserved and used for mixed bathing.[17]

Etiquette

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Baskets

Ensuring cleanliness

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As at a sentō at an onsen, all guests are expected to wash and rinse themselves thoroughly before entering the hot water. Bathing stations are equipped with stools, faucets, wooden buckets, and toiletries such as soap and shampoo; nearly all onsen also provide removable shower heads for bathing convenience. Entering the onsen while still dirty or with traces of soap on the body is socially unacceptable.[b]

Swimsuits

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Guests are not allowed to wear swimsuits in the baths and must be completely nude. However, there are some onsen that allow both men and women to enter together but require swimsuits. Many of these mixed onsen resemble more of a pool or waterpark than the traditional idea of an onsen.[18][19][20] In 2016, The Japan Times reported that guests were not normally allowed to wear swimsuits in the baths. However, some modern onsen required their guests to wear a swimming suit in their mixed baths.[21]

Towel

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Onsen guests generally bring a small towel with them to use as a wash cloth. The towel can also provide a modicum of modesty when walking between the washing area and the baths. Some onsen allow one to wear the towel into the baths, while others have posted signs prohibiting this, saying that it makes it harder to clean the bath. It is against the rules to immerse or dip towels in the onsen bath water, since this can be considered unclean. People normally set their towels off to the side of the water when enjoying the baths, or place their folded towels on top of their heads.

Tattoos

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By 2015, around half (56%) of onsen operators had banned bathers with tattoos from using their facilities.[22][23][24] The original reason for the tattoo ban was to keep out yakuza and members of other crime gangs who traditionally have elaborate full-body decoration.[25]

However, tattoo-friendly onsen do exist.[26] A 2015 study by the Japan National Tourism Organisation found that more than 30% of onsen operators at hotels and inns across the country will not turn someone with a tattoo away; another 13% said they would grant access to a tattooed guest under certain conditions, such as having the tattoo covered up.[22] Some towns have many tattoo-friendly onsen that do not require guests to cover them up. Two such towns are Kinosaki Onsen in Hyōgo and Beppu Onsen in Ōita.[27]

With the increase in foreign customers due to growing tourism, some onsen that previously banned tattoos are loosening their rules to allow guests with small tattoos to enter, provided they cover their tattoos with a patch or sticking plaster.[22][28]

Benefits

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There are various health benefits attributed to bathing in onsen.[29][30][31] Onsen are particularly renowned for their relaxing and therapeutic effects.[31] These effects are due to properties such as the temperature, pressure, and mineral composition of the water.[32]

A 2014 study conducted in Beppu, a city famous for its onsen, found that regular bathing in onsen has various health benefits such as lowering blood pressure, improving circulation and cardiovascular health, reducing chronic pain and fatigue, and lowering the rate of depression.[30] A survey conducted in Atami, another city famous for its onsen, found that individuals with onsen in their homes were less likely to take blood pressure medication than those without onsen.[29]

There are various types of onsen including carbonated springs, iron-containing springs, acidic springs, strong-smelling sulfur springs, among others.[29] Each type of onsen is believed to have unique benefits. Carbonated springs, for example, are believed to lead to smooth skin.[29] Onsen facilities often advertise various health and beauty benefits they claim their water to provide.[33][34]

Water at some onsen facilities is drinkable.[35][36][37] Onsen water should only be consumed if it is confirmed to be safe to drink by the prefecture.[36] The water should be obtained from a designated drinking source that is separate from the water which is bathed in.[36] The often mineral-rich onsen water is believed to have benefits such as treating iron-deficiency anemia or constipation.[35][37]

Risks

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Article 18, paragraph 1 of the Japanese Hot Springs Act publishes guidance on contraindications and cautions for bathing in hot springs, and drinking their respective waters.[38] Although millions of Japanese bathe in onsen every year with few noticeable side effects, there are still potential side effects to onsen usage, such as aggravating high blood pressure or heart disease.[39]

Legionella bacteria have been found in some onsen with poor sanitation.[40][41] For example, 295 people were infected with Legionella and seven died at an onsen in Miyazaki Prefecture in 2002.[41][42][c] Revelations of poor sanitary practices at some onsen have led to improved regulation by hot-spring communities to maintain their reputation.[43]

There have been reports of infectious disease found in hot bodies of water worldwide, such as various Naegleria species.[44] While studies have found the presence of Naegleria in hot spring waters, Naegleria fowleri, responsible for numerous fatal cases of primary amoebic meningoencephalitis around the world, has not been found to be present in the water at onsen.[44] Nevertheless, fewer than five cases have been seen historically in Japan, although not conclusively linked to onsen exposure.[45]

Many onsen display notices reminding anyone with open cuts, sores, or lesions not to bathe. Additionally, in recent years onsen are increasingly adding chlorine to their waters to prevent infection, although many onsen purists seek natural, unchlorinated onsen that do not recycle their water but instead clean the baths daily.[43] These precautions as well as proper onsen usage (i.e. not placing the head underwater, washing thoroughly before entering the bath) greatly reduce any overall risk to bathers.

Voyeurism is reported at some onsen. In 2016, The Japan Times reported that this was mitigated in some prefectures of Japan where nude mixed bathing is not permitted, and that visitors must wear swimsuits.[21][46][47] In 2021, several people were arrested in connection with an organized group accused of taking photos of women in open-air baths.[48][49]

Bathing methods

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In addition to typical large public baths (大だい浴場よくじょう, daiyokujō) and outdoor baths (露天風呂ろてんぶろ, roten-buro), there are various other methods of experiencing onsen that can be found at various facilities throughout Japan. Examples include:

  • Waterfall baths (打うたせ湯ゆ, utase-yu): hot water is released from an elevated position and the pressure of the water has a massaging effect.[50]
     
    Utase-yu waterfall bath at Tarutama Onsen (垂たれ玉だま温泉おんせん)
  • Steam baths (蒸むし湯ゆ, mushi-yu): onsen steam is released in either a small room or a "steam box" (in which one immerses their body up to their neck) which has an effect similar to a sauna.[50]
  • Sleeping baths (寝ね湯ゆ, ne-yu): shallow baths in which one lies down. These can be used for sleeping, but there is a risk of overheating.[51]
  • Foot baths (足湯あしゆ, ashi-yu): these are usually separate from main onsen facilities and are typically free. As only the feet and lower legs are immersed in the onsen water, users are otherwise fully clothed.
  • Sand baths (砂湯すなゆ, suna-yu): an individual lies in or is buried partially in sand which is heated by onsen water or another source.[50] Yukata are usually worn in the sand baths and they are mixed-gender.
  • Ganban'yoku (岩盤がんばん浴よく): heated stones on which visitors lie down while wearing kannaigi (館内たてうち着ぎ), or a type of casual Japanese indoor wear.[52] As clothing is worn in ganban'yoku, they are mixed-gender and located in a separate location from the nude bathing area of an onsen facility.

Saunas are also sometimes located at onsen bathing facilities. A relatively cold bath called mizu-buro or sui-furo (水風呂みずぶろ) is often located directly outside a facility's sauna to allow users to quickly cool down. The cycle of entering hot baths, saunas, and cold baths at an onsen facility is sometimes referred to as totonou (ととのう) and is believed to be refreshing and to have health benefits.[53][54]

Selected onsen

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Main article: List of hot springs in Japan
 
Old Tsuru-no-yu Bathhouse in Nyūtō Onsen area, Akita
 
Winter bathing at Tsuru-no-yu rotten-buro in Nyūtō, Akita
 
Kurokawa Onsen roten-buro in Kyushu
 
Japanese macaques enjoying a roten-buro open-air onsen at Jigokudani Monkey Park
 
Yumura-onsen's hot-spring resort and forests in Shin'onsen, Hyōgo
 
Dōgo Onsen hot springs (main building) in Matsuyama, Ehime
 
Ginzan Onsen in Obanazawa, Yamagata
 
Kusatsu Onsen
 
Onsen tamago (black egg) Miyanoshita Onsen

See also

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Notes

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  1. ^ due to varying interpretations of terminology and local ordinances, rare instances of mixed bathing still exist at places like Tsurunoyu Onsen where the water is opaque.[15]
  2. ^ In very isolated onsen, where there is no possibility to use soap before entering in the bath, onsen users are expected to at least rinse their body with the water of the bath before entering it.
  3. ^ In addition to this case, two people were infected and one died at Arima Onsen in 2022. In the same year, Legionella bacteria up to 3,700 times the standard value were detected at an onsen in Fukuoka Prefecture because the water was changed only twice a year.[42]

References

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  2. ^ "Public Baths in Japan". www.japan-guide.com. Retrieved 17 October 2018.
  3. ^ a b c d "温泉おんせんの歴史れきし（現代げんだい）※第だい二に次じ世界せかい大戦たいせん後ご | 日本にっぽん温泉おんせん協会きょうかい". 一般いっぱん社団しゃだん法人ほうじん 日本にっぽん温泉おんせん協会きょうかい　～温泉おんせん名人めいじん～ (in Japanese). Retrieved 25 July 2024.
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  7. ^ a b "温泉おんせんの歴史れきし（古代こだい）※奈良なら時代じだい～平安へいあん時代じだい | 日本にっぽん温泉おんせん協会きょうかい". 一般いっぱん社団しゃだん法人ほうじん 日本にっぽん温泉おんせん協会きょうかい　～温泉おんせん名人めいじん～ (in Japanese). Retrieved 30 July 2024.
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  20. ^ "Yunessun" Retrieved June 4 2024
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  22. ^ a b c Ryall, Julian (6 November 2015). "Japanese owners of famous 'onsen' hot springs soften their stance on tattoo ban to appease foreign visitors". Archived from the original on 17 January 2016.
  23. ^ Thompson, Ashley (6 November 2012). "If you need to bring drugs to Japan, sort out the paperwork — or else". The Japan Times. Archived from the original on 19 July 2015.
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  32. ^ "体たいのこわばり緩和かんわ、むくみ改善かいぜん ～温泉おんせんによる科学かがく的てきな効果こうか（国際医療福祉大学こくさいいりょうふくしだいがく大学院だいがくいん 前田まえだ眞治しんじ教授きょうじゅ）～". 時事じじメディカル (in Japanese). Retrieved 25 July 2024.
  33. ^ "温泉おんせん浴場よくじょうのご案内あんない｜源泉げんせん100%かけ流ながしの「ひょうたん温泉おんせん」". www.hyotan-onsen.com. Retrieved 25 July 2024.
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Further reading

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  • Hotta, Anne, and Yoko Ishiguro. A Guide to Japanese Hot Springs. New York: Kodansha America, 1986. ISBN 0-87011-720-3.
  • Fujinami, Kōichi. Hot Springs in Japan. Tokyo: Board of Tourist Industry, Japanese Government Railways; Maruzen Company, Ltd., 1936.
  • Neff, Robert. Japan's Hidden Hot Springs. Rutland, Vermont: Charles E. Tuttle, 1995. ISBN 0-8048-1949-1.
  • Seki, Akihiko, and Elizabeth Heilman Brooke. The Japanese Spa: A Guide to Japan's Finest Ryokan and Onsen. Boston: Tuttle Publishing, 2005. ISBN 0-8048-3671-X. Reprinted as Ryokan: Japan's Finest Spas and Inns, 2007. ISBN 0-8048-3839-9.
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