The info sign also has a sticker with a QR code to be read by your compatible cell phone. You can then access the respective URL and see more information.

File information
Filename:	hc156-20090409_8108.jpg
Album name:	philbert / Hikone Castle Honmaru 彦根城本丸
Keywords:	shiga / hikone / castle
Filesize:	20 KiB
Date added:	Jul 02, 2009
Dimensions:	400 x 267 pixels
Displayed:	143 times
URL:	https://photoguide.jp/pix/displayimage.php?pid=31417
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