July 30, 2025—Amateur Radio on the International Space Station (ARISS) has received schedule confirmation for an ARISS radio contact between an astronaut aboard the International Space Station (ISS) and students at the Osaka-Kansai Japan Expo located in Osaka, Japan. ARISS conducts 60-100 of these special amateur radio contacts each year between students around the globe and crew members with ham radio licenses aboard the ISS.
The Osaka-Kansai Japan Expo (Expo) runs from April 13 to October 13, 2025.
This ARISS radio contact is being held as an official event of the Expo under the title “Communication with the Universe that Resonates Life,” in honor of the Expo’s theme “Designing a Future Society where Life Shines Brightly”. Children from the public, with an interest in space and science, will be asking questions in front of Expo visitors.
This will be a direct contact via Amateur Radio allowing students to ask their questions of astronaut Takaya Onishi, amateur radio call sign KF5LKS. The downlink frequency for this contact is 145.800 MHz and may be heard by listeners that are within the ISS-footprint that also encompasses the relay ground station.
The amateur radio ground station for this contact is in Osaka, Japan. Amateur radio operators using call sign 8K3EXPO, will operate the ground station to establish and maintain the ISS connection.
The ARISS radio contact is scheduled for August 1, 2025 at 6:45 pm JST (Osaka, Japan) (9:45 UTC, 5:45 am EDT, 4:45 am CDT, 3:45 am MDT, 2:45 am PDT).
The public is invited to watch the live stream at: https://www.youtube.com/live/FbNoDr0XMHo?si=4P0jQSdZnfxd-Vf8
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As time allows, students will ask these questions:
1. 10歳の時、何に夢中になっていましたか。
2.宇宙飛行士の訓練は、宇宙で難しい仕事をするのに、どのように役立っていますか。
3.宇宙ステーションでの寝心地はどうですか。よく眠ることができますか。
4.宇宙飛行士の仕事で楽しいと思う事は何ですか。
5.国際宇宙ステーションから肉眼で海の深さによって色が違う事は分かりますか。
6.宇宙から、流れ星はどのように見えますか。
7.宇宙では においの ひろがりかたは 地球と ちがいますか。
8.地上から宇宙ステーション到着まで、どれくらいの時間がかかりますか
9.宇宙ステーションからは、丸い地球全体が見えますか。
10. 宇宙で体験したことで、一番大変だったことは何ですか。
11. 宇宙食にはどんなものがありますか。また、一番おいしいものは何ですか。
12.宇宙から雷を見ることは可能でしょうか。見えるのであればどのように見えるかも教えてください。
13.宇宙に匂いはありますか。
14. ISSで自給自足することは可能ですか。
15.電気エネルギーは、すべて太陽光発電に頼っていますか。
16. 宇宙ステーションで生活している間、特別な食事制限をしていますか。もしそうなら、それはなぜですか。
17.無重力空間では、地上よりも素早く動けますか。
18. 宇宙船内でくしゃみをしたらどうなりますか。
Translation:
1. What were you into when you were 10 years old?
2. How does astronaut training help you do hard tasks in space?
3. How comfortable is sleeping in space?
4. What do you enjoy about being an astronaut?
5. Can you see with the naked eye from the ISS that the color of the ocean varies depending on its depth?
6. How do shooting stars look like from space?
7. Is the way smell spreads in space different from on Earth?
8. How long does it take to reach the space station from Earth?
9. Are you able to see the whole round Earth from your view on the space station?
10. What was the most challenging thing you encountered in space?
11. What kind of space food do you have and which is the most delicious?
12. Can you see lightning from space? If yes, how does it look?
13. Does outer space itself have a smell?
14. Is it possible to be self-sufficient on the ISS?
15. Does the ISS rely entirely on solar power for its electrical energy?
16. Are you on a special diet while you live in the space station? If so, why?
17. Do you feel more agile living in zero gravity than on Earth?
18. What happens if you sneeze in the space station?