一通 (いっつう)one copy (of a document); one letter; one-way traffic

one copy (of a document); one letternoun (common) (futsuumeishi)
one-way trafficnoun (common) (futsuumeishi)
pure straight; winning hand containing nine consecutive tiles of the same suit (i.e. 1-9)noun (common) (futsuumeishi)

一通, its kanji, and other words that share them.Open this graph

Kanji in 一通

一つひとつone
一方いっぽうone (esp. of two); the other
一時いちじone o'clock
一月いちがつJanuary
一番いちばんnumber one; first
一般いっぱんgeneral; universal
一部いちぶone part; one portion
十一じゅういちeleven; 11
見通しみとおしunobstructed view; perspective
通信つうしんcorrespondence; communication
交通こうつうtraffic; transportation
共通きょうつうcommon; shared
普通ふつうnormal; ordinary
通常つうじょうusual; ordinary
通産省つうさんしょう(former) Ministry of International Trade and Industry (now Ministry of Economy, Trade and Industry); MITI
通貨つうかcurrency

See how 一通 connects to the rest of Japanese.