Koike said Riyadh’s expo will be a “sustainable event” and a “surprise to the whole world.” (ANJ) Japan will pass expo baton to Saudi Arabia in 2025 after it hosts upcoming Osaka Expo Saudi Arabia, Japan can learn from each other on green issues, Gov. Koike Yuriko says Diana Farah DUBAI: The governor of Tokyo hopes World Expo 2030 in Riyadh will be an exciting and sustainable event with the potent