10 source-backed records whose verified scope explicitly identifies Japan. This is an observance index, not a public-holiday calendar.
Japan’s current government holiday guidance identifies Constitution Memorial Day on 3 May, explains that it commemorates the Constitution taking effect on 3 May 1947, and states that the ho…
Japan’s Cabinet Office lists the Emperor’s Birthday as a national holiday on February 23 and explains that the holiday has existed under the National Holidays Act since 1948, with its date…
The Japan National Tourism Organization describes the third day of the third month as the annual Hina Matsuri or Doll’s Festival/Girls’ Day celebration in Japan.
Japan’s National Holidays Act establishes Children’s Day on May 5; Cabinet Office historical material documents its original 1948 establishment and date-selection rationale.
Japan’s Act on National Holidays, as amended by Act No. 43 of 2014, establishes Mountain Day on 11 August and states its purpose as providing an opportunity to become familiar with mountain…
Japan’s Prime Minister’s Office documents the Nagasaki Peace Memorial Ceremony on 9 August 2026, while Nagasaki’s official visitor information says the ceremony is held on 9 August every ye…
Japan’s Cabinet Office explains that Respect for the Aged Day has fallen on the third Monday of September since 2003; in 2026 that is 21 September. It separately identifies 15 September as…
Japan’s Act on National Holidays names Sports Day and sets it on the second Monday in October.
Japan Tourism Agency and National Diet Library material verify Tanabata as a traditional seventh-day/seventh-month festival with early Japanese court history; JNTO and government cultural m…
Japan National Tourism Organization identifies White Day on 14 March as a Japanese gift-giving custom; Japanese public-sector and industry-history material supports the national confectione…
