One of them could be the Post Office service mark 〒, (called yūbin māku), a sign stylized from the katakana
EXIF info:
Nikon D90
Lens: 8-16mm F/4.5-5.6G
Focal Length: 9mm
Aperture: F/5.6
Shutter Speed: 1/500s
ISO Sensitivity: ISO 200
Muza-chan's Gate to Japan
EXIF info:
Nikon D90
Lens: 8-16mm F/4.5-5.6G
Focal Length: 9mm
Aperture: F/5.6
Shutter Speed: 1/500s
ISO Sensitivity: ISO 200