
If you are in the Osaka area this Sunday and want a laid-back day out that costs nothing to get into, this one is worth a look. Senshu Onpa Sai 2026 (泉州 音波祭 2026) takes over WHATAWON, an entertainment mall in Kishiwada, on October 25, 2026, from 11:00 to 20:00. The theme is surf culture told through waves, sound and film: talk shows by a California-based board shaper and a Japanese pro surfing champion, live reggae and hip-hop, food stalls, surf shops and an evening raffle.
You do not need to surf to enjoy it. Below is what is on, who is cooking and playing, and a few things to know before you go.
Key facts: date, venue and admission
| Event | Senshu Onpa Sai 2026 (泉州 音波祭 2026) |
|---|---|
| Date | Sunday, October 25, 2026 |
| Hours | 11:00–20:00 |
| Venue | WHATAWON (ワタワン) |
| Address | 1-32-1 Kishinooka-cho, Kishiwada, Osaka (大阪府岸和田市岸の丘町1丁目32-1) |
| Admission | Free |
| Music | Cashless tipping system |
| Pets | Welcome |
| Organizer | antiqua Inc. (株式会社antiqua), operator of WHATAWON |
| Official site | whatawon.co.jp |

WHATAWON is a mixed shopping, dining and entertainment complex in Kishiwada, run by antiqua Inc., which is based in Izumi, Osaka. The facility describes itself as pet-friendly, so bringing your dog is part of the idea rather than a grudging exception.
Part of the festival’s sales will be donated to help run ISOKOKIDS 2027, a surfing competition for children. The organizer says the money goes toward kids who surf and the next generation of surf culture.
Talk shows: Eisaku Murata and Sasuke Kawatani

Eisaku Murata: how a surfboard gets made
Eisaku Murata grew up in Osaka and now works as a hand shaper in Huntington Beach, California. That is also where Olympic surfer Kanoa Igarashi is from. In his talk, Murata covers how boards are built, what surfing looks like in California, and everyday life around Huntington Beach. This is a rare chance to hear it firsthand if you are curious about board making or life on the US West Coast.
A signing session is planned right after the talk. If you attend the talk, you can join the signing with no sign-up or extra requirements.

One of his models is RIPPLE, a board shaped with the skills and feel he built up in Huntington Beach. The rider for this model is Gen Azuchi.
Sasuke Kawatani: a slide talk from a national champion
Sasuke Kawatani (河谷佐助) is a Japan Pro Surfing grand champion, and he gives a slide talk on surfing and the competitive side of the sport. The venue also introduces TOBY, the brand he produces. Throughout the day, a big screen keeps running footage from the Isonoura Kids Surfing Contest 2026 (磯の浦キッズサーフィンコンテスト2026).

Food stalls

The food area leans toward Osaka street food and Mexican dishes. The stall to look out for is Takoken, where Takoyaki Bar reef (たこ焼きバーreef), coming in from Okayama, makes takoyaki in front of you. Original craft beer by Kibi Doteshita Bakushu (吉備土手下麦酒) and reef is also planned. Coffee and other drinks are available too.
| Stall | What they serve |
|---|---|
| Takoken (たこ健) | Takoyaki |
| egg-i (eggイ〜) | Waffles and more |
| Inetomame (イネトマメ) | Tacos and other Mexican food |
| teru kitchen | Tacos, walking tacos, cheese quesadillas, drinks |
| Apapacho Tamales Calientito (アパパチョ・タマレス・カリエンティート) | Tamales oaxaqueños, a traditional dish from southern Mexico |
| Glash Beam (グラッシュビーム) | Glasses, coffee and more |
Shops and surf brands
The shopping area mixes surf shops with art and handmade goods. The children’s surf group Isonoura Kids runs a booth that introduces its activities and sells contest T-shirts. That same booth is also where you get raffle tickets later in the day.
| Shop | What you will find |
|---|---|
| California Wave Longboard Gallery (カリフォルニアウェーブロングボードギャラリー) | Surf shop |
| Isonoura Kids (磯の浦キッズ) | Activity showcase, contest T-shirts and more |
| Umizanmai TV (海ざんまいTV) | Surf videos and goods |
| TOBY | Brand produced by Sasuke Kawatani |
| gw78base | Driftwood art and more |
| chikirisurf2nd | Surf shop |
Music lineup and cashless tipping
The stage covers reggae, hip-hop, DJ sets and a band act, with Up Down Sound handling the sound system. The music does not have a ticket price. Instead it uses cashless tipping, so you pay only if you want to support an act. The release does not say which payment methods are accepted. If you do not have a Japanese card yet, our guide to credit cards in Japan for foreigners explains which one to get first.
| Performer | Note |
|---|---|
| Up Down Sound (アップダウンサウンド) | Sound system |
| DJ uru | DJ |
| Ariyan Heads (アリヤンヘッズ) | Listed performer |
| DJ QUEST | DJ |
| JONES | Hip-hop crew |
| KOUKI | Listed performer |
| satoshi | Listed performer |
| Tasan (たーさん) | Solo live, from the band Natural Roots (ナチュラルルーツ) |
| No Name (ノーネーム) | Listed performer |
Performers may still be added or changed.
Raffle at 18:30

From 18:30, a raffle takes place in front of the stage, and everyone at the venue can take part. Tickets are handed out at the Isonoura Kids booth and by event staff, so pick one up while you are walking around in the afternoon. Guest speeches are planned just before the draw. The prizes were not listed in the announcement.
Same day nearby: kcp Mirai Hanabi fireworks

On the same Sunday, Tombo-ike Park in Kishiwada holds the 5th kcp Mirai Hanabi (第5回 kcp未来花火 ~うちらの100円募金花火~). This is a separate event at a different venue with a different organizer, not part of Senshu Onpa Sai.
| Date | Sunday, October 25, 2026 |
|---|---|
| Hours | 11:00–19:30 |
| Fireworks | From 18:00 (planned) |
| Venue | Mizube no Hiroba, Tombo-ike Park, Kishiwada (岸和田市 蜻蛉池公園 水辺の広場) |
| Organizer | Kishiwada City Promotion Council (一般社団法人岸和田シティプロモーション推進協議会) |
| Weather | Goes ahead in the rain |
The fireworks start at 18:00 and the WHATAWON raffle starts at 18:30, so you will likely have to choose one. Decide before the evening which matters more to you. If fireworks are your thing, we also covered where to watch the Setagaya Tamagawa fireworks and how to get home.
Tips before you go
- Entry is free, but the music runs on tips. Have a payment app or card ready if you want to tip. The accepted methods were not announced.
- Bring the dog. Pets are allowed at the festival.
- Grab a raffle ticket early. The Isonoura Kids booth and staff hand them out, and the draw starts at 18:30.
- Check talk times on the day. They were not published in the announcement, and the program may change.
- Getting there: the announcement does not include access details. See the WHATAWON official site for directions and parking.
- Staying all day? Nine hours of photos and videos can drain your phone. Our guide to free ChargeSPOT power bank rentals with d VALUE PASS shows one way to top up while you are out.
Looking for more free or cheap days out? See the Shibaura Canal Festival with free canal cruises, the Musashino Art University Festival guide, and, if you are staying around Osaka, the Asoview campaign with discounts on spots such as Harukas 300.
FAQ
- Q. Is Senshu Onpa Sai 2026 free to enter?
- Yes. Entry is free. The music acts use a cashless tipping system, so you can tip performers if you want to.
- Q. What time does it start and end?
- It runs on Sunday, October 25, 2026, from 11:00 to 20:00 at WHATAWON in Kishiwada, Osaka.
- Q. Can I bring my dog?
- Yes. Pets are welcome at the festival, and WHATAWON describes itself as a pet-friendly facility.
- Q. Who can join the raffle?
- Everyone at the venue. Tickets are handed out at the Isonoura Kids booth and by staff, and the draw starts at 18:30 in front of the stage.
- Q. Is the kcp Mirai Hanabi fireworks show part of this festival?
- No. It is a separate event at Tombo-ike Park in Kishiwada with a different organizer. Fireworks are planned from 18:00.
- Q. Do I need to sign up for the signing session after Eisaku Murata’s talk?
- No. If you attend the talk, you can stay for the signing session without any extra application.
Source: antiqua Inc. press release (October 22, 2026). Details may change, so check the official site for the latest.
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