List: out-dated or obsolete kana usage

obsolete reading  JLPT N1  usually written using kana alone  godan verb  godan verb (archaic)  verb (generic)  intransitive verb 

• to become attached (to), to take (to), to become affectionate (with), to be tamed, to get close (e.g. to someone emotionally), to become intimate (with)

gikun or jukujikun  obsolete reading  usually written using kana alone  noun  noun (generic) 

• sea cucumber (Holothuroidea spp.)

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

• eared seal (esp. the California sea lion, Zalophus californianus), sea lion

obsolete reading  noun  noun (generic) 

• beginning of the world, creation

obsolete reading  noun  noun (generic)  noun taking the genitive case particle の  adjective (generic)  Buddhism 

• Apocrypha (i.e. as opposed to the Biblical canon)
• non-Buddhist writings (esp. Confucian writings)

obsolete reading  noun  noun (generic) 

• dried fish (or shellfish, etc.)

obsolete reading  noun  noun (generic) 

• leisure

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

• (common) millet (Panicum miliaceum), proso millet

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

• great burdock (Arctium lappa), gobo

obsolete reading  noun  noun (generic) 

• falsehood, untruth, lie