One of the tidbits of trivia I picked up while researching this was that Nagai was that he apparently was somehow an inspiration for the song "Southpaw" by Pink Lady (or maybe just his pitching motion was an inspiration for the choreography). Through the wonder of YouTube, here's Pink Lady performing the song - Nagai does not appear in this video however:
Nagai had a number of baseball cards during his career from Yamakatsu, Calbee and Takara. He's appeared in a number of the OB Lions sets over the last 10 years or so.
|1978 Yamakatsu JY6|
|1982 Takara Lions #31|
|1988 Takara Whales #13|
|1990 Takara Hawks #31|
|2010 BBM Lions 60th Anniversary #68|