Adventure World is pleased to announce that it will host the "2026 Shirahama Town 20th Birthday Celebration," organized by Shirahama Town, Wakayama Prefecture, at the park.
We invite you to spend this special, smile-filled time with friends and family at this once-in-a-lifetime "20th Birthday Celebration."

【2026 Shirahama Town 20th Birthday Celebration】
■Date & Time: Sunday, January 4, 2026 ( Reiwa 8 ) 3:30 PM ~
(Park Admission: 11:00 AM ~)
■Ceremony Venue: Big Ocean, Adventure World
■Eligible Participants: Free admission for those eligible for the "Reiwa 8 (2026) Shirahama Town 20th Birthday Celebration" (born between April 2, 2005 (Heisei 17) and April 1, 2006 (Heisei 18)) and their families.
　　　　　　 　　　
■Organizer: Shirahama Town
■Cooperation: Adventure World
※The park will operate as usual on Sunday, January 4, 2026, the day of the 20th Birthday Celebration.
※Event details may change due to circumstances. Updates will be posted on the Shirahama Town website.
※For inquiries, please contact the Shirahama Town Board of Education (0739-43-5830).

～Past Shirahama Town Coming-of-Age Ceremonies and 20th Birthday Celebrations held at Adventure World～
　　2026 (Reiwa 8) marks the 5th time the event will be held at the park.

　　October 24, 2021 (Reiwa 3) Reiwa 3 Shirahama Town Coming-of-Age Ceremony was also held online due to the impact of the novel coronavirus pandemic.
January 4, 2022 (Reiwa 4) Reiwa 4 Shirahama Town Coming-of-Age Ceremony
January 4, 2023 (Reiwa 5) Reiwa 5 Shirahama Town 20th Birthday Celebration
(Reiwa 5) January 4, 2023: Shirahama Town 20th Birthday Celebration 2024 (Reiwa 6) January 4, 2024: Shirahama Town 20th Birthday Celebration
2025 (Reiwa 7) January 4, 2025: Shirahama Town 20th Birthday Celebration