Sikhism in Japan is a small, minority religion (Japanese: 日本のシーク教徒, romanized: Nihon no shīku kyōto, lit.

In 1900, Puran Singh went to Japan for his studies at Tokyo University in the field of pharmaceutical chemistry, where he later became a Buddhist monk.

[9] Many Sikhs served in the Azad Hind army, working with the Japanese Empire to oust the British colonists from India.

[12] Many Sikh asylum seekers (some of which have birthed children on Japanese soil) have been refused residency in the country and are threatened with deportation.

[14] Some Sikhs have experienced racism at-first from their native Japanese neighbours, being mistaken as "terrorists" due to their unique appearance from the rest of the society, with the police keeping surveillance on them.

[7] Many Tokyoite Sikhs are illegal aliens who have overextended on a tourist visa and remain in the country until they either marry a local person or get deported.

[7] Amongst Sikh families who have lived in the country for generations, knowledge of the Punjabi language and Gurmukhi script is fading from memory.

[7] Tomio Mizokami is a renowned Japanese academic who has studied the Punjabi-language and Sikh religion for decades, publishing many works and teaching courses on these subjects at universities.

[16] In 2019, Sikh environmental organization, EcoSikh, adopted Japanese botanist Akira Miyawaki's tree plantation method to be used in its mission to plant mini-forests it calls 'Guru Nanak Sacred Forests'.

[14] The Tokyo gurdwara is officially named the 'Tokyo Guru Nanak Darbar', serving the local Tokyoite Sikh congregation and those near the city, around 70 devotees in total as of 2016.