What's this? A postcard in my collection of vintage Japanese postcards. Feel free to add comments or questions below the image. Click on "add comment." All postcards are owned by Philbert Ono and not for sale.
Center divided back
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From March 1, 1918, the dividing line moved to the center of the card to separate the message and recipient's address.
In this way, if the postcard has no postmark or stamp, you can still estimate the date of the card by checking the address side and see if there is a divider or not, an off-center divider, or a center divider.