2025.09.23

日本最初の切手 手彫切手「竜百文」40 面シートが収蔵されました Japan's First Postage Stamp - Hand-Carved "Dragon 100-Mon" Stamp Sheet (40 stamps) Added to Collection

2025.09.23

昭和天皇御婚儀（不発行）切手 3銭と20銭 Emperor Shōwa’s Wedding Commemorative Stamps (Unissued) – 3 Sen and 20 Sen

2025.08.09

ワシントンD.C. スミソニアン郵政博物館 訪問記 Visit to the Smithsonian National Postal Museum, Washington, D.C.

2024.08.22

手彫切手（和紙仮名入り）2銭, 20銭 追加 Added “Handcarved (Etched) stamps” << Japanese paper with Syllabics >> 2sen, 20sen Added "Handcarved (Etched) stamps" in JSDM official website

2024.04.30

みほん切手 追加 Added “specimen stamps” Added "specimen stamps" in JSDM official website

2023.01.01

JSDMオフィシャルサイト開設 Opened JSDM official website Opened JSDM official website