| | | |
| bakuretsu ryûdan | 爆裂榴弾 | high explosive shell |
| bakuretsu shôjûdan | 爆裂小銃弾 | explosive bullet |
| bakuro jinchi | 暴露陣地 | exposed (field) position |
| bakuryô | 幕僚 | staff officer |
| bakuryôchô | 幕僚長 | chief staff officer |
| bakuyaku | 爆薬 | powder, explosive |
| banba chûtai | 馬場中隊 | draught horse company |
| bankoku sekijûjisha | 万国赤十字社 | International Red Cross Society |
| bansôkô | 絆創膏 | (adhesive) bandage, sticking plaster |
| banzai! | 万歳 | banzai! (long live the Emperor) (Note: Literally: "Ten thousand years!" (i.e., to the Emperor)) |
| bappô | 罰俸 | reduction of pay (as punishment) |
| barasuto | バラスト | ballast (for airships) |
| bôbi butai | 防備部隊 | defence force |
| bôeki kyûsuibu | 防疫給水部 | infectious disease prevention and water supply unit |
| bôekihan | 防疫班 | infectious disease prevention squad |
| bôkû | 防空 | anti-aircraft defence |
| bôkû butai | 防空部隊 | anti-aircraft defence unit |
| bokumetsu | 撲滅 | destruction, eradication |
| bôsen | 防戦 | defensive warfare |
| boshû | 募集 | recruitment (Note: In a military context, this term refers to the recruitment of soldiers; but it is also used more generally to refer to the recruitment of employees, contractors, volunteers, etc. ) |
| botai | 母隊 | home regiment |
| bôtô | 暴徒 | riot, insurgency |
| budan seiji | 武断政治 | military government (Note: This term is no longer frequently used; contemporary texts tend to use "gunji seiken" or "gunsei") |
| bugi | 武技 | military arts |
| bukan | 武官 | military official, officer (Note: as opposed to a civil official) |
| buki | 武器 | weapon (general) (Note: Can refer to any weapon of war, e.g., rifles, swords or cannons are all "buki") |
| buki gakari kashi | 武器掛下士 | non-commissioned officer in charge of arms & equipment |
| bumpai | 分配 | distribution (of supplies or equipment) |
| bungyô kyôiku | 分業教育 | specialised training (Note: This term would appear on the service records of officers or soldiers in training) |
| bunka | 分課 | allotment of duties |