List of Symbols that can be Converted on Japanese Keyboard
Highlights
hishigata ◇◆
Source: https://jpn.pioneer/ja/support/manual/navi/13cyber/index.php?section=49
Other source:
Full list of symbols in Unicode
How to type the symbols (in Japanese)
Symbols that can be converted to kanji | かな漢字変換できる記号 | Kana Kanji Henkan Dekiru Kigou
ikooru ＝ , goudou ≡ , dainari ＞ , shounari ＜ , batsu × , futougou ≠ , purasu/tasu ＋ , mainasu/hiku － , purasu mainasu ± , mugen/mugendai ∞ , nazenaraba (because) ∵ , yueni (therefore) ∴ , kakeru × , waru ÷
Symbols – mark | 記号・マーク | Kigou – maaku
kuroboshi ★ , kuromaru ● , shiroboshi ☆ , shiromaru ○ , sankaku ▲ , shikaku □ , zukei (shape) ☆ (etc), maru
○● , nijuu-maru
◎ , hishigata ◇◆, hoshi ☆★, osu ♂, mesu ♀ , yuubin 〒
Unit (partial) | 単位 | tan-i
en ￥ , sesshi ℃ , doru ＄ , pondo ￡ , byou ″ , fun
′ , paasento ％ , paamiru ‰
Dot | 点 | Ten
dakuten (tenten) ゛, handakuten (maru) ゜
Others (partial) | その他 | Sonota
asutarisuku/asuterisuku ＊, attomaaku ＠, anpasando ＆, onpu ♪, kara/naishi ～ , kome/hoshi ※ , shaapu ♯ , shasen ／ ＼
More (unlisted here, please go to the source website)
Greek letters | ギリシア文字 | Girishia moji
Brackets, parentheses | 括弧 | kakko
Arrow| 矢印 | yajirushi
Complete list:
https://support.justsystems.com/faq/1032/app/servlet/qadoc?QID=040825
Others:
https://www.sony.jp/support/vaio/beginner/school/typing/09.html
https://kids.nifty.com/cs/kuchikomi/kids_soudan/list/aid_140804484990/1.htm