List: out-dated or obsolete kana usage

obsolete reading  noun  noun (generic)  archaic 

• gathering, place where people gather
• police station, camp, barracks

obsolete reading  usually written using kana alone  noun  noun (generic) 

• garlic chives (Allium tuberosum), Chinese chives, Chinese leek

obsolete reading  noun  noun (generic) 

• rent, tear, split

obsolete reading  usually written using kana alone  noun  noun (generic) 

• mint (e.g. peppermint, spearmint, etc.)
• Japanese peppermint (Mentha arvensis var. piperascens)

popular  obsolete reading  rarely used kanji form  JLPT N5  usually written using kana alone  pronoun 

• that way, that direction, over there, yonder
• that (one)
• that person
• there, over there, foreign country (esp. a Western nation)

obsolete reading  usually written using kana alone  noun  noun (generic) 

• fin (e.g. of a fish)

obsolete reading  search-only kanji form  noun  noun (generic) 

• dawn, daybreak

irregular reading  obsolete reading  noun  noun (generic) 

• weight (for scales), counterweight

obsolete reading  noun  noun (generic)  obsolete term 

• separate matter
• different meaning
• special reason, special circumstances

obsolete reading  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic)  slang  video games  noun or participle taking the aux. verb する 

• peerless, unparalleled, unparallelled, matchless
• mowing down the enemy