Kuvandudzwa kukuru kwekubhomba kweJapan kwakanga kuri B-29 Superfortress, iyo yakanga ine nzvimbo inoshanda yemakiromita 2.500; inenge 90% yemabhomba (147,000 matani) akadonhedzwa pazvitsuwa zveJapan zvakapihwa nebhomba iri. Kurwisa kwokutanga kweB-29 muJapan
rakanga riri pana 15 June 1944, richibva kuChina. Mabhomba eB-29 akabva kuChengdu, kure nemakiromita anopfuura 1 500. Uku kurwisa hakunawo kubudirira zvikuru: vanobhomba makumi mana nevanomwe chete pavanobhomba makumi matanhatu nevasere vakasvika munharaunda yavarwi.