Not too long ago, the Japanese government came up with a campaign called "Cool Japan"to boost up the tourist numbers with Tokyo's geeky Akihabara as the lynchpin. I think the term could've come in vogue decades earlier with this song.
"Koi no Kisetsu"(Season of Love) has got that half-kitschy, half-cool vibe that would've made it at home on any Quentin Tarentino movie soundtrack. The flute and the hoary bass really bring back the 60s. And the band, Pinky and Killers, can go down in history as having one of the most imaginative names. But they settled for having their debut song go down in history as having the most number of weeks at No. 1 (17 weeks)...still unbroken. But it isn't a continuous streak. After the 12th week, it was usurped for one week by another song but came back to the top spot for another 5 weeks. The single sold 2.7 million copies and earned a Japan Record Award before finishing up its magic run as the 4th-ranked single of 1968 and a spot on the Kohaku.
Singer-actress Yoko Kon（今陽子） was Pinky, responsible for that resonant alto while backed up by her Killers. They were quite the Dapper Dans...and Daniella...in their ties and bowler hats.
The band also ended up on the closing credits of some TV show. And they apparently get occasionally invited to reprise the song on some nostalgic music show....which is almost an industry in itself in Japan.