🇯🇵 Tokyo

Tokyo uses the Muslim World League method (method 3 in our calculator), an 18-degree Fajr and 17-degree Isha convention adopted by the Japan Islamic Trust and the major mosques on the Yoyogi-Uehara, Otsuka, Asakusa and Shinjuku circuit. Japan has no national Islamic authority that prescribes a fixed method, so MWL has emerged as the consensus default for a non-Muslim-majority country at mid-northern latitude. The 18-degree solar depression behaves predictably at Tokyo's 35.7°N position and avoids the abnormally late Isha values that stricter conventions produce in summer. Tokyo Camii's published timetable, which most apps and prayer-time sites mirror, uses the same standard. Visitors who arrive with apps set to a regional default such as Karachi or Egyptian will see Fajr and Isha drift by a few minutes, but Dhuhr, Asr and Maghrib remain identical because they depend on the sun's transit and altitude rather than on a twilight angle.

Prayer times in Tokyo shift most around the summer and winter solstices because the city sits at 35.7° north, far enough from the equator to feel a clear day-length swing. In late June, Fajr is calculated for the brief pre-dawn window before sunrise around 04:25 local time, while Isha falls after 20:30, giving roughly sixteen hours of fasting in Ramadan when it falls in summer. By late December the picture inverts: sunrise slips past 06:45, Maghrib arrives before 16:35 and the entire arc of obligatory prayers compresses into less than ten daylight hours. The equinoxes in March and September are the calmest periods, when daily prayer slots move only a minute or two either way. Tokyo Camii and the Otsuka Mosque update their printed schedules monthly to absorb this drift smoothly.

Tokyo hosts a small but steadily growing Muslim community of roughly 100,000–150,000 across the wider metropolitan area, made up mostly of long-term residents from Indonesia, Pakistan, Bangladesh, Turkey and the Arab world, alongside a smaller cohort of Japanese converts. Numbers are not officially counted because Japan does not record religion on the census, so figures come from researchers tracking mosque attendance and visa categories. Students from Indonesian and Malaysian universities, IT and engineering professionals, and halal food entrepreneurs are particularly visible in Shibuya, Shinjuku and Toshima wards. The Japan Islamic Trust, Japan Muslim Association and several university Islamic societies coordinate community life, while halal-certified restaurants and prayer rooms have multiplied in central Tokyo since the 2010s. The community remains a minority of well under one percent of city residents, but its institutional footprint is mature.

Tokyo Camii in Yoyogi-Uehara, Shibuya City, hosts the largest Friday prayer in the Japanese capital and is the principal congregation for the city's Muslim residents and visitors. Rebuilt in 2000 over the foundations of an earlier Tatar prayer hall and funded with Turkish support, the Ottoman-revival mosque is administered by the Turkish Religious Affairs Directorate (Diyanet) and seats over a thousand worshippers, with overflow on the courtyard and balconies during Eid. Otsuka Mosque in Toshima City is the second-busiest weekly gathering, particularly for the South Asian community, and Asakusa Mosque, Hira Mosque in Shinjuku and the Tokyo Camii Annex serve smaller neighbourhood congregations. Friday khutbas are typically delivered in Arabic with Japanese, Turkish or English translation depending on the mosque, and most start between 12:30 and 13:30 to accommodate office workers' lunch breaks.

Prayer times differ between cities because they are calculated from the apparent position of the sun, which depends on a city's latitude, longitude and the date. Tokyo sits at 35.7°N, 139.65°E in the Asia/Tokyo time zone, so its sunrise, solar noon and sunset all happen earlier in clock time than in cities to the west and shift differently across the year than at higher or lower latitudes. Two cities at very different latitudes — say London at 51°N and Riyadh at 24°N — see twilight unfold over different durations, so Fajr, Maghrib and Isha can sit several hours apart even on the same calendar date. Even cities at similar latitudes diverge if they fall in different time zones or follow different calculation conventions for the Fajr and Isha twilight angles.