https://en.wikipedia.org/wiki/List_of_Japanese_map_symbols

Symbol GSI Meaning Unicode Description
◬ ○ Base triangulation surveying point U+25EC Dot in upward-pointing triangle
○ Electronic triangulation point Dot in upward-pointing triangle with flag
⊡ ○ Benchmark U+22A1 Dot in square
⛭ ○ Factory U+26ED Gear without hub
⛯ ○ Lighthouse U+26EF Map symbol for lighthouse
⛮ ○ Power station U+26EE Gear with handles
文 ○ Elementary or junior high school U+6587 Kanji bun
㉆ ○ High school U+3246 Kanji bun in a circle
○ University Kanji bun with a smaller kanji 大 (for daigaku) in brackets on top
○ Technical college Kanji bun with a smaller kanji 専 (for senmon gakkō) in brackets on top
〶 ○ Post office U+3036 Down tack (T-shape) with overbar in circle
〒 × Sub post office (not distribution centre) U+3012 Down tack (T-shape) with overbar
⭙ ○ Police station U+2B59 Heavy circled saltire
☓ ○ Koban (police box) U+2613 Diagonal cross (saltire)
⊕ ○ Public health centre U+2295 Greek cross in circle
⛨ ○ Hospital Greek cross in shield
⭖ ○ Prefectural Office U+26FB Oval bullseye
⭗ ○ City hall U+2B57 Heavy circle with circle inside
◉ ○ Ward office U+25C9 Fisheye
⭘ ○ Town hall U+2B58 Heavy circle
⛩ ○ Shinto shrine U+26E9 Shinto shrine
卍 ○ Buddhist temple U+534D Manji (Swastika)
⛫ ○ Castle U+26EB Castle
⛼ ○ Cemetery U+26FC Headstone graveyard symbol
♨ ○ Onsen (hot springs) U+2668 Oval with three vertical wavy lines
⛬ ○ Historical landmark U+26EC Historic site
⛰ ○ Summit U+26F0 Mountain