Hopkins spent his first two Japanese seasons with the Carp in 1975 & 76. He has a ton of cards in the 1974-75 and 1975-76 Calbee sets - five in the 1974-75 set and 27(!) in the 1975-76 set. He also had a card in the one of the Broder sets (JA5) from 1975. He moved to the Nankai Hawks for his final season in 1977 - as far as I can tell he only had one card in 1977 in the Calbee "Osaka Series" set. From the name of the set I assume that it shows him as a Hawk (since the Hawks played in Osaka at the time).
I only have two of the 33 Calbee cards that were issued for him, both from the 1975-76 set:
|1975/76 Calbee #286|
|1975/76 Calbee #320|
Since his retirement as a player Hopkins has only appeared in a couple of BBM's OB sets. He was in two of the Carp specific sets - the 2009 Carp 60th Anniversary set and the 2015 Carp Legend set - and last winter's Time Travel 1975 set:
|2009 BBM 60th Anniverary #36|
|2015 BBM Carp Legends #44|
|2017 BBM Time Travel 1975 #51|
H/T to NPB on Reddit's tweet.