is the sixth single by Japanese singer-songwriter Hideaki Tokunaga. Written by Tokunaga and Keiko Asà Â, the single was released through Apollon on October 25, 1988.
Tokunaga co-wrote "Saigo no Iiwake" after experiencing a painful breakup with someone he was dating at the time. As a result of the breakup, he involuntarily shed tears while performing the song on the TBS music show The Best Ten.
The song was used as the opening theme of the Kansai TV/Fuji TV drama series . It was also featured in the 1993 film Tora-san's Matchmaker.
The song is included in Tokunaga's compilation albums Single Collection (1986~1991) (1998), Beautiful Ballade (2006), Singles Best (2008), Vocalist & Ballade Best (2011), and All Time Best Presence (2016). Tokunaga re-recorded the song in the albums Self Cover Best ~ Kagayaki Nagara~ (2003) and Eien no Hateni ~ Self Cover Best I ~ (2018).
"Saigo no Iiwake" reached number 4 on Oricon's singles chart, number 100 on Oricon's 1988 year-ending chart and number 69 on Oricon's 1989 year-ending chart.
"Saigo no Iiwake" has been covered in Japan by Midori Karashima, Satoshi Furuya, Ruru Honda, and Junko Yamamoto.
The song also achieved popularity in the Philippines, where it was recorded in several adaptations: Ted Ito released Ikaw Pa Rin, Keempee de Leon performed My One and Only, and Maso produced both Kailanman in Tagalog and Come Back Home in English. Additionally, saxophonist Jake Concepcion issued an instrumental version.