Kurutta Taiyou

{{Infobox album

| name = Kurutta Taiyou

| type = Studio album

| artist = Buck-Tick

| cover = Buck-Tick - Kurutta Taiyou.jpg

| alt =

| released = {{Start date|1991|2|21}}
{{Start date|2002|9|19}} (digital remaster)
{{Start date|2007|9|5}} (remaster)

| recorded = {{Start date|13|9}}-{{Start date|1990|11|20}}

| venue =

| studio = Victor (Tokyo)

| genre = {{hlist|Post-punk|industrial rock}}

| length = 54:06

| language = Japanese, English

| label = Victor

| producer = Buck-Tick

| prev_title = Aku no Hana

| prev_year = 1990

| next_title = Darker Than Darkness -Style 93-

| next_year = 1993

| misc = {{Singles

| name = Kurutta Taiyou

| type = Studio

| single1 = Speed

| single1date = January 21, 1991

| single2 = M・A・D

| single2date = June 5, 1991

| single3 = Jupiter

| single3date = October 30, 1991

}}

}}

{{Nihongo|Kurutta Taiyou|狂った太陽|"Lunatic Sun"}} is the sixth studio album by the Japanese rock band Buck-Tick. It was released on cassette and CD on February 21, 1991, through Victor Entertainment.{{cite web | title= Kurutta Taiyou | work= jame-world.com | url=http://www.jame-world.com/us/items-3939-kurutta-taiyou.html | access-date = 2011-04-12}} The album was digitally remastered and re-released on September 19, 2002, with two bonus tracks. It was remastered and re-released again on September 5, 2007. "Speed", "M・A・D" and "Jupiter" were later re-recorded for the group's compilation album Koroshi no Shirabe: This Is Not Greatest Hits (1992).

The album peaked at number two on the Oricon charts.{{cite web|url=http://www.geocities.jp/object_ori/910304a.html|title=1991.3.4 TOP 20|archiveurl=https://web.archive.org/web/20181106015440/http://www.geocities.jp/object_ori/910304a.html|archivedate=2018-11-06|language=ja}} It was certified platinum (400,000 copies sold) within a month of its release,{{cite web|url=https://www.riaj.or.jp/f/data/cert/gd.html|title=月次認定作品 認定年月：1991年 3月 (Dropdown menu: 1991年 3月)|publisher=RIAJ|accessdate=2022-05-16|language=ja}} and has sold 326,580 copies during its run in the Oricon album chart.{{cite web|url=http://www.geocities.jp/object_ori/1991a.html|title=1991年 アルバム年間TOP100|archiveurl=https://web.archive.org/web/20160303204249/http://www.geocities.jp/object_ori/1991a.html|archivedate=2016-03-03|language=ja}}{{cite news |date=24 October 2023 |title=Buck-Tickの主な記録 『悪の華』など5作でオリコン週間アルバムランキング1位獲得 |trans-title=Buck-Tick's main records: Achieved 1st place in the Oricon weekly album rankings with 5 albums including "Aku no Hana" |url=https://www.oricon.co.jp/news/2299899/full/ |language=ja |work=Oricon |access-date=26 October 2023}}

The album earned the band a nomination for Best Album at the 33rd Japan Record Awards.{{cite web |script-title=ja:第33回日本レコード大賞 |url=http://www.jacompa.or.jp/record/33.php |publisher=Japan Composer's Association |access-date=September 12, 2023 |language=ja}} It was named number 40 on Bounce{{'}}s 2009 list of 54 Standard Japanese Rock Albums.{{cite web|title=日本のロック・スタンダード・アルバム54(3) |url=http://tower.jp/article/feature/2009/06/03/100036730/100036731/100036733|work=Tower Records|date=2009-06-03|access-date=2018-02-20}}