List: out-dated or obsolete kana usage

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

• toad (esp. the Japanese toad, Bufo japonicus)

obsolete reading  rarely used kanji form  usually written using kana alone  noun  noun (generic)  sumo 

• fundoshi, loincloth, traditional Japanese men's undergarment made from a length of cotton
• kimono underskirt
• wrestler's ornamental apron

popular  obsolete reading  rarely used kanji form  JLPT N2  usually written using kana alone  food, cooking  noun  noun (generic) 

• udon, thick Japanese wheat noodles

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

• talkativeness, garrulity, loquacity

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

• any bird of family Motacillidae (excluding the pipits), wagtail, longclaw

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

• Chinese soft-shelled turtle (Pelodiscus sinensis), soft-shelled turtle (Trionychidae)
• trap door located on the walkway in a kabuki theatre
• bilge pump (used on traditional Japanese ships)

obsolete reading  noun  noun (generic) 

• plot, trick, evil scheme

obsolete reading  noun  noun (generic) 

• misdeed, wrongdoing, wickedness

obsolete reading  noun  noun (generic) 

• dried fish, stockfish

obsolete reading  obsolete kanji  irregular kanji usage  noun  noun (generic) 

• nonsense, silly talk, drivel, rubbish