Memory Seishun no Hikari

{{Use mdy dates|date=October 2012}}

{{More citations needed|date=February 2024}}

{{Infobox song

| name = Memory Seishun no Hikari

| cover = Morning_Musume_-_Seishun.jpg

| alt =

| type = single

| artist = Morning Musume

| album = Second Morning

| released = February 10, 1999 (JP)

| recorded = 1999

| studio =

| venue =

| genre = J-pop

| length = 19:57 (8 cm CD)
25:30 (12 cm CD)

| label = Zetima

| writer = Tsunku

Producer = Tsunku

| producer =

| prev_title = Daite Hold on Me!

| prev_year = 1998

| next_title = Manatsu no Kōsen

| next_year = 1999

| misc = {{External music video|1= {{YouTube|YLBP_NHK3Mo|Memory Seishun no Hikari}}|header=}}

}}

{{nihongo|"Memory Seishun no Hikari"|Memory 青春の光|Memory: The light of youth}} is the fourth single from the J-pop idol group Morning Musume, released on February 10, 1999 as an 8 cm CD.{{cite web |title=元・モー娘。福田明日香、昨年7月離婚していた |url=https://www.oricon.co.jp/news/2094591/full/ |website=Oricon Music |date=July 24, 2017 |access-date=6 February 2024}} It sold a total of 410,850 copies, and reached number two on the Oricon Charts. In 2004, it was re-released as part of the Early Single Box and again in 2005 as a 12 cm CD. Lead vocals of this single were Natsumi Abe and Asuka Fukuda. Prior to this single's release, on January 17, 1999, Fukuda shocked viewers of the television show Asayan with her decision to "graduate" from Morning Musume and continue with her studies.

"Never Forget", one of the coupling tracks on the single, is often traditionally sung by band members at their graduation concerts and/or final TV appearances with the group, prior to embarking on solo careers or new groups.