Denshi Jisho — Online Japanese dictionary

にぐん second string players (sports)
Common word, Noun, No-adjective 
にごう 1: number two;
2: mistress; concubine
Common word, Noun 
にせい 1: second generation; foreigner of Japanese parentage;
2: junior;
3: two existences; the present and the future;
4: the second (king of the same name)
Common word, Noun 
にばん second; number two; runner-up
Common word, Noun 
にぶん 1: halving; bisection;
2: the two equinoxes (vernal and autumnal)
Common word, Noun, Suru verb, No-adjective 
にまい two sheets (pieces) (of paper)
Common word, Noun 
にるい second base
Common word, Noun 
にわり 20 percent
Common word, Noun 
ふたえ 1: double; two-fold; two layers; duplex;
2: (Prefix) diplo-; dipl
Common word, Noun, No-adjective 
ふたつ two
Common word, Numeric 
ふたみ forked (road, river)
Common word, No-adjective 
ふたり two persons; two people; pair; couple
Common word, Noun 
ふつか 1: second day of the month;
2: two days
Common word, Noun 
じこく second of nine traditional astrological signs (corresponding to Saturn and southwest)
Noun 
じなん second son
Noun 
におう the two guardian Deva kings
Noun 
にかい twice
Noun, No-adjective 
にかく binuclear
Noun, No-adjective 
にかん two departments (under the ritsuryo system: the Dept. of State & the Dept. of Worship)
Noun 
にくん two masters
Noun 
にけん two ken (approx. 3.6m)
Noun 
にげん duality; binary (system)
Noun, No-adjective 
にこう second watch (approx. 9 pm to 11 pm)
Noun, Archaism 
にこう dyadic
Noun, No-adjective, Computer terminology 
にごん 1: double-dealing; double tongue; going back on what one has said;
2: repeating oneself
Noun 
にさん two or three
Adverbial noun 

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