There were two very impressive home runs last Thursday. Yoshio Itoi of the Tigers hit the back wall of the Tokyo Dome during their game against the Giants (H/T NPB Reddit for the link to the video):
Masataka Yoshida of the Buffaloes launched an impressive shot into the center field seats for a grand slam at the Osaka Dome (not using corporate names until I get a check) against the Lions:
While it looks like Itoi's went further, according to Dingers This Week it was actually Yoshida's home run that was hit further - 435 to 420 feet. (Surprisingly Zealous Wheeler of the Eagles actually had the second longest home run of Thursday with a 422 foot shot - Itoi's was third longest on the day.)
Here's are BBM team set cards for both Itoi and Yoshida. Both of these are from "Newcomer" subsets - Yoshida's is from his rookie year of 2016 (card #Bs72) while Itoi's is from last year (#T72) - his first year (obviously) with Hanshin after four years with Orix.