In this handout photo taken by the Imperial Household Agency of Japan on August 13, 2026 and released on September 6, 2026, Japan's Prince Hisahito (R) visits the Science Museum of Map and Survey in Tsukuba, Ibaraki Prefecture, northeast of Tokyo, ahead of his 20th birthday. (Photo by Handout / Imperial Household Agency of Japan / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / IMPERIAL HOUSEHOLD AGENCY" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO CROPPING

In this handout photo taken by the Imperial Household Agency of Japan on August 13, 2026 and released on September 6, 2026, Japan's Prince Hisahito (R) visits the Science Museum of Map and Survey in Tsukuba, Ibaraki Prefecture, northeast of Tokyo, ahead of his 20th birthday. (Photo by Handout / Imperial Household Agency of Japan / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / IMPERIAL HOUSEHOLD AGENCY" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO CROPPING

In this handout photo taken by the Imperial Household Agency of Japan on August 13, 2026 and released on September 6, 2026, Japan's Prince Hisahito looks on as he visits the Science Museum of Map and Survey in Tsukuba, Ibaraki Prefecture, northeast of Tokyo, ahead of his 20th birthday. (Photo by Handout / Imperial Household Agency of Japan / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / IMPERIAL HOUSEHOLD AGENCY" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO CROPPING

In this handout photo taken by the Imperial Household Agency of Japan on August 13, 2026 and released on September 6, 2026, Japan's Prince Hisahito (R) visits the Science Museum of Map and Survey in Tsukuba, Ibaraki Prefecture, northeast of Tokyo, ahead of his 20th birthday. (Photo by Handout / Imperial Household Agency of Japan / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / IMPERIAL HOUSEHOLD AGENCY" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO CROPPING

In this handout photo taken by the Imperial Household Agency of Japan on August 13, 2026 and released on September 6, 2026, Japan's Prince Hisahito (R) visits the Science Museum of Map and Survey in Tsukuba, Ibaraki Prefecture, northeast of Tokyo, ahead of his 20th birthday. (Photo by Handout / Imperial Household Agency of Japan / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / IMPERIAL HOUSEHOLD AGENCY" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO CROPPING

In this handout photo taken by the Imperial Household Agency of Japan on August 13, 2026 and released on September 6, 2026, Japan's Prince Hisahito looks on as he visits the Science Museum of Map and Survey in Tsukuba, Ibaraki Prefecture, northeast of Tokyo, ahead of his 20th birthday. (Photo by Handout / Imperial Household Agency of Japan / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / IMPERIAL HOUSEHOLD AGENCY" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO CROPPING

In this handout photo taken by the Imperial Household Agency of Japan on August 13, 2026 and released on September 6, 2026, Japan's Prince Hisahito (R) visits the Science Museum of Map and Survey in Tsukuba, Ibaraki Prefecture, northeast of Tokyo, ahead of his 20th birthday. (Photo by Handout / Imperial Household Agency of Japan / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / IMPERIAL HOUSEHOLD AGENCY" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO CROPPING

In this handout photo taken by the Imperial Household Agency of Japan on August 13, 2026 and released on September 6, 2026, Japan's Prince Hisahito looks into an instrument at the Science Museum of Map and Survey in Tsukuba, Ibaraki Prefecture, northeast of Tokyo, ahead of his 20th birthday. (Photo by Handout / Imperial Household Agency of Japan / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / IMPERIAL HOUSEHOLD AGENCY" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS - NO CROPPING