https://youtu.be/1I_hmK3rcyQ https://www.sncorp.com/what-we-do/dream-chaser-space-vehicle/

https://sorabatake.jp/11685/

https://sorae.info/space/20200722-spaceport-oita.html

https://www.youtube.com/watch?v=EAkkJwYX7LU

https://www.pref.oita.jp/soshiki/14270/

https://www.apu.ac.jp/home/

https://www.city.kunisaki.oita.jp/site/kyouikukage/baiensiryoukan.html

https://response.jp/article/2020/03/08/332412.html

https://astrocean.jp/

https://www.spaceport-japan.org/

https://www.space-walker.co.jp/

https://kachimai.jp/taiki-spaceport/history.php

https://prtimes.jp/main/html/rd/p/000000001.000078016.html

http://www.istellartech.com/

https://prtimes.jp/main/html/rd/p/000000001.000078016.html

https://www.anahd.co.jp/group/pr/201906/20190606.html https://www.ana-spaceproject.com/

https://www.pref.oita.jp/site/sinzidai/sinzidai128.html

https://www.biglobe.co.jp/wp/wp-content/uploads/2021/03/20210323_biglobe_onsen_work.pdf

http://uchuriyo.space/snet/oita2020/assets/images/kyushumeti.pdf

https://pdas.co.jp/

https://shimojishima.jp/?locale=ja

https://www.spaceport-japan.org/concept

https://hokkaidospaceport.com/donate/