Ikegami Honmon-ji

{{Short description|Head temple of the Nichiren Shū in Tokyo, Japan}}

{{Infobox religious building

| name = Ikegami Honmon-ji

| native_name = 池上本門寺

| image = Ikegami Honmon-ji precincts.jpg

| image_size =

| alt =

| caption = Soshi-dō (founder’s hall)

| map_type =

| map_size =

| map_alt =

| map_caption =

| location = 1-1-1, Ikegami, Ōta-ku
Tokyo 146-8576

| coordinates =

| religious_affiliation = Nichiren Buddhism{{cite encyclopedia|encyclopedia=Kokushi Daijiten (国史大辞典) |title=Honmon-ji (本門寺) |url=http://rekishi.jkn21.com/ |accessdate=2012-04-20 |year=2012 |publisher=Shogakukan |location=Tokyo |language=ja |url-status=dead |archiveurl=https://web.archive.org/web/20070825113418/http://rekishi.jkn21.com/ |archivedate=2007-08-25 }}

| deity =

| country = Japan

| functional_status =

| website = [http://honmonji.jp/ Ikegami Honmon Temple]

| founded_by = Nichiren

| year_completed = 1282

}}

{{nihongo|Ikegami Honmon-ji|池上本門寺|}} is a temple of the Nichiren Shū south of Tokyo, erected where Nichiren is said to have died.

A short walk from Ikegami Station (Tōkyū Ikegami Line) or Nishi-Magome Station (Toei Asakusa Line), Ikegami Honmon-ji contains a number of buildings, most of which have been reconstructed since the bombing of 15 March 1945. They include the Important Cultural Property designated five-storey pagoda built in 1608, the kyōzō ({{nihongo2|経蔵}}, repository of religious writings) built in 1784, and the hōtō ({{nihongo2|宝塔}}), built in 1781 where Nichiren was cremated. Other buildings have been rebuilt, or newly constructed, since 1945.

Now in Ōta-ku, suburban Tokyo, Ikegami Honmon-ji was at some distance from the city until the mid-20th century. Basil Hall Chamberlain and W. B. Mason wrote of it in 1907: "Its fine situation and magnificent timber make it one of the most attractive points within easy reach of Tōkyō."Basil Hall Chamberlain and W. B. Mason, A Handbook for Travellers in Japan, 8th ed. (London: John Murray, 1907), 138.

The area between the station and the temple hosts a large festival, O-Eshiki ({{nihongo2|お会式}}), from 11 to 13 October, with mandō ({{nihongo2|万灯}}, an elaborate representation of a lantern stand) and matoi; thousands of worshippers visit the temple.

A memorial tablet for the sinking of the American warship USS Oneida (1861) which was rammed and sank outside Yokohama by the British steamer Bombay on 24 January 1870, with a loss of 125 people, was placed at the temple in May 1889, after a Buddhist ceremony was held in memory of the lost sailors.