List: word usually written using kana alone

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

• mantis shrimp (any marine crustacean of order Stomatopoda, esp. the species Oratosquilla oratoria), mantis crab, squilla

search-only kana form  ateji  search-only kanji form  usually written using kana alone  yojijukugo  な adjective  adjective (generic)  noun  noun (generic) 

• reckless, daredevil, frantic, foolhardy

usually written using kana alone  colloquial  noun  noun (generic)  Buddhism 

• brat, kid, urchin, little devil
• preta, hungry ghost

usually written using kana alone  Ichidan verb  verb (generic)  intransitive verb 

• to come untied, to come apart
• to be softened, to be relaxed

usually written using kana alone  expression 

• outrageous, scandalous, inexcusable, disgraceful, shameful, rude, unreasonable

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)

usually written using kana alone  noun  noun (generic) 

• pocket heater, hand warmer, heater pack

popular  usually written using kana alone  noun  noun (generic) 

• sea turtle

gairaigo  Russian origin  gikun or jukujikun  usually written using kana alone  noun  noun (generic) 

• walrus (Odobenus rosmarus)
• elephant seal (Mirounga spp.)

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

• sea cucumber (Holothuroidea spp.)