赤

red soil aggregate; akadama; clay-like volcanic ash soil (used for bonsai, etc.)

whiskered velvet shrimp (Metapenaeopsis barbata); red rice prawn

Colloquial

spider mite (any mite of family Tetranychidae)

Japanese sea fig (Ficus superba var. japonica)

red snow (due to microscopic algae, yellow sand, etc.)

common house mosquito (Culex pipiens); northern house mosquito

red gold

redlip mullet (Chelon haematocheilus)

ruddy kingfisher (Halcyon coromanda)

Rare term

trout

はらあか only

Japanese dace (Tribolodon hakonensis)

はらか only

Nibe croaker (Nibea mitsukurii)

Sumo

red tassel hung above the southeast corner of the ring

red-clawed crab (Chiromantes haematocheir)

orange-red; reddish orange; fire red

red

Bodianus cylindriatus (species of hogfish)

bronze-red (colour, color)

red phosphorus

redwood; sequoia

Tabanus chrysurus (species of horsefly)

far infrared

bright red

hematite

loose-flowered hornbeam (Carpinus laxiflora); akashide

internal organs such as heart, liver, kidneys used as food