List: out-dated or obsolete kana usage

popular  obsolete reading  JLPT N1  noun  noun (generic) 

• fixed date, appointed date, set date
• deadline, due date

popular  obsolete reading  JLPT N2  な adjective  adjective (generic)  noun  noun (generic) 

• strict, severe, stringent, rigorous, rigid, firm, strong, secure

popular  obsolete reading  JLPT N2  noun  noun (generic) 

• book, publication

popular  obsolete reading  JLPT N3  noun  noun (generic) 

• books

popular  obsolete reading  JLPT N3  noun  noun (generic) 

• coal

popular  obsolete reading  search-only kanji form  JLPT N5  noun  noun (generic)  noun or participle taking the aux. verb する  transitive verb 

• washing, laundry
• relaxation, rejuvenation, melting away (of worries, fatigue, etc.)

popular  obsolete reading  JLPT N4  noun  noun (generic) 

• grandfather
• old man
• kyogen mask used for the role of an old man

popular  obsolete reading  JLPT N2  noun  noun (generic)  archaic  Kyoto-ben 

• amateur, layman, ordinary person, novice
• respectable woman (i.e. not a prostitute, hostess, geisha)
• unlicensed prostitute

popular  obsolete reading  noun  noun (generic)  noun or participle taking the aux. verb する 

• advance or retreat, moving forwards or backwards, movement
• course of action, behaviour, conduct, attitude
• remaining in one's post or resigning, staying or leaving

popular  obsolete reading  obsolete kanji  numeric  historical term  noun  noun (generic) 

• one-hundredth, 0.3 mm (one-hundredth of a sun), 0.1 percent (one-hundredth of a wari), 0.0375 grams (one-hundredth of a monme)
• rin (monetary unit; 0.001 yen)