● All Japanese postage stamp and leaf documents issued from Meiji to Reiwa 7/6, as well as original Ryukyu/Southern Occupation Area postage stamp, and Manchukuo stamps are stored.
● The postage stamp name, date of issue, English postage stamp name, sheet structure, pattern explanation, number issued, postage stamp number, face value, evaluation, etc. are posted.
● The size has been changed from A5 size (148 mm x 210 mm) to B5 size (182 mm x 257 mm) so far, making it easier to see.