Heartwarming Main Manga Trivia YMMV
Hey, It's That Voice!:
Relationship Voice Actor:
The afforementioned Straw Hat Pirates, Hiroaki Hirata, Mayumi Tanaka and Cho as part of the Nanba family. Much certain antics of comedy between the Nanba parents...
Yuko Sanpei & Miyuki Sawashiro have been friends in other series such as .
Kimi ni Todoke JoJo's Bizarre Adventure related: Kazuyuki Okitsu and Kenjiro Tsuda were opponents in the 2012-2013 anime series as Jonathan and Bruford. Akio Ohtsuka and Kenji Nomura besides astronauts, they ended up as part of the Pillar Men, Wamuu and Santana. Miyuki Sawashiro is another Joestar descendent(in the All Star Battle videogame), Jolyne; Hiroaki Hirata is Polnareff (also probably reprising his role in the 2014 anime of Stardust Crusaders) and Yuko Sanpei is Narancia.
Though not directly talked to each other, Ryo Naitou and Kenjiro Tsuda are tennis players, Koharu Konjiki and Sadaharu Inui, both known as data players of their respective schools in The Prince of Tennis. Also, Ryuji Otoji and Seto Kaiba in Yu-Gi-Oh!.
Miyuki Sawashiro and Ryo Naitou both participated quite for a time in the Di Gi Charat franchise, heck, Miyuki's first role ever was Puchiko!
Other trivia accounts:
The character design of Dr. Nasuda, the director of JAXA in the series is based in that of Dr. Makio Mukai, the husband of the first Japanese woman in space, Chiaki Mukai. His name is also the play on the word NASDA, which happens to be the predecessor of JAXA.