https://2025.ivs.events/ja/speakers/day_4 2025-06-26T19:24:52Z https://2025.ivs.events/ja/speakers/day_3 2025-05-26T22:53:01Z https://2025.ivs.events/ja/speakers/day_2 2025-05-26T22:52:59Z https://2025.ivs.events/ja/speakers/day_1 2025-05-26T22:52:55Z