Naniwa Ward - 浪速区

Healthy Onsen - Sakuragawa

Japanese Name: ヘルシー温泉 桜川店Prefecture: OsakaCity: Osaka - NaniwaAddress: 大阪府大阪市浪速区桜川3丁目1−13Access: Sakuragawa Station / 桜川駅Type: SentoWebpage: http://www.tateba.com/onsen/sakura.htmlPrice: Osaka Prefecture Public Bathhouse Association price or cheaper (sauna, if available, may be extra)Holiday: NoneHours: 06:00-24:00
ReviewPerfect little sento nearish to Nanba making it a good place to know. Also it's open all day from 6am! The great radon bath and a very hot deep normal water bath make this one worth trying out. Lots of TVs to watch in the bathing areas. Check out their sister sento Tabeta which is the review just below this one.
Update April 2020: This sento has been remodeled since this review was written.

Healthy Onsen Tateba

Japanese Name: ヘルシー温泉タテバPrefecture: OsakaCity: Osaka-NaniwaAddress: 大阪府大阪市浪速区桜川2-14-19Access: Sakuragawa Station / 桜川駅Type: SentoWebpage: http://www.tateba.com/Price: Osaka Prefecture Public Bathhouse Association price or cheaper (sauna, if available, may be extra)Holiday: NAHours: 14:00-5:00 (the following morning)
ReviewLarge sento that actually refers to itself as a “supersento” on their own webpage. This is one of the sento that were at the forefront of the transition to the current sento - supersento landscape we have now. This is also an open all night place so if you need someplace to chill (or boil) till 5am there you go. Baths are different on both sides but include a large outdoor area and monkey bars in one of the baths for stretching. Tabeta is a fun place and worth checking out the same with Healthy Onsen Sakuragawa their smaller sister establishment down the road (and the review just above this one).
Update April 2020: This sento has been remodeled since this review was written.

Nanba Onsen

Japanese Name: なんば温泉Prefecture: OsakaCity: Osaka - NaniwaAddress: 大阪府大阪市浪速区難波中3-4-10Access: Namba Station / 難波駅Type: SentoPrice: Osaka Prefecture Public Bathhouse Association price or cheaper (sauna, if available, may be extra)Holiday: ThursdayHours: 14:00-24:00
ReviewOne of the first sento I went to in Japan. This is a classic Osaka style sento with a radon bath and steam sauna. Great location close to all the big spots in the Namba area.

Radium Onsen

Japanese Name: ラジウム温泉Prefecture: OsakaCity: Osaka - NaniwaAddress: 大阪府大阪市浪速区恵美須東1-4-13Access: Dobutsuenmae Station / 動物園前駅 - ShinImamiya Station / 新今宮Type: SentoWebpage: http://www.radium.co.jp/sentou/index.htmlPrice: Osaka Prefecture Public Bathhouse Association price or cheaper (sauna, if available, may be extra)Holiday: 2nd and 4th ThursdayHours: 6:00-24:00
ReviewLocated right in front of Tsutenkaku, the Osaka tower, in the middle of Osaka's old downtown. Radium Onsen is one of the best maintained Showa-era sentos, but there's more. The men’s outdoor bath has a great big Japanese garden and perfect view of Tsutenkaku. Not sure how good the women’s side is. Great location and a great classic Osaka sento feel.

Spadio

Japanese Name: 天然温泉スパディオPrefecture: OsakaCity: Osaka - NaniwaAddress: 大阪府大阪市浪速区桜川2-1-1Access: Sakuragawa Station / 桜川駅Type: Capsule HotelWebpage: http://www.spadio.net/Price: From ¥1000 (1 hour)Holiday: NoneHours: 24hrs
ReviewThis is a capsule hotel overnight sauna style place close to Namba. Good for a quick bath too. There is a open air bath that looks over the Osaka Loop highway. The hot spring is decent. A coupon for ¥500 off the free time price is available on their website.
Hot Spring DataWell Name: Naniwa Shichisachi no Yu - なにわ七幸の湯Spring Type: Simple alkaline hot spring - アルカリ性単純温泉pH Type: Weak alkaline - 弱アリカリ性Well Temperature: 37.8Spring Type: Hot spring - 温泉Osmotic Pressure: Low - 低張性

Spaworld

Japanese Name: スパワールドPrefecture: OsakaCity: Osaka-NaniwaAddress: 大阪市浪速区恵美須東3丁目3-4-24Access: Dobutsuenmae Station / 動物園前駅 - ShinImamiya Station / 新今宮Type: PoolWebpage: http://www.spaworld.co.jp/english/Price: ¥1300Holiday: NoneHours: 10:00-8:45 (the next day) Pools have different hours
ReviewAmazingly huge. Called the world's biggest hot spring resort. This is like a waterpark that is open all year round. Spend hours in the bathing suit required mixed bathing pools and enjoy all the slides (rides sold at a separate cost). There are play areas for children and, in the summer, a roof top outdoor pool. After all the fun there are two different themed bathing areas. One is Asian the other European. The water is from a hot spring source but I didn't really feel it. You go here for the slides and pools. Super fun and a must try for everyone.
*Hot Spring Data*Spring Type: Simple Hot Spring - 単純温泉Well Temperature: 39.4°CTemperature Type: Hot spring - 温泉pH: 7.3pH Type: Neutral - 中性Osmotic Pressure: Low - 低張性

Taihei no Yu - Nanba

Japanese Name: 太平のゆ なんば店Prefecture: OsakaCity: Osaka - NaniwaAddress: 大阪府大阪市浪速区敷津東2丁目2−8Type: SupersentoWebpage: http://www.taiheinoyu.jp/mysite13/indexn.htmlPrice: ¥850Holiday: NoneHours: 8:00-24:00
ReviewPart of the renovation of this historically tough neighborhood in Osaka, this supersento is on the second floor of a supermarket and marketplace building. I wasn't sure what to expect when walking along the Nankai tracks through warehouses and old row houses. What I found was a newly remodeled commercial food market with this sento build on top.The stairs, the signs outside, and design of the building was all very well done. Inside I was also pleasantly surprised. Lots of open floor space in the lobby. There's a big restaurant, a ganbanyoku (Korean-style heated stone resting area), and, of course a bathing area with a wide rotenburo.The inside baths are well built with good basic yet clean feeling tile work. The jet bath maze was one of the largest I've seen. Outside the rotenburo is more like a covered gazebo. This is most likely due to it's closeness to residential towers and the an elevated freeway. So there's no great view of the outside or sky, but the plants make up for it and provide a great atmosphere. This is also a great place for people who like their baths bubbling. They have a large carbonated bath outside and a microbubble bath inside.No natural hot spring, but the location, cleanness, selection of baths, and atmosphere all make up for it.