• 主おも

  chief, main, principal, important

• 主あるじ

  head (of a household), proprietor (of a store), proprietress, landlord, landlady, master (of a servant)

• 主しゅ

  (one's) master, (one's) employer, (one's) lord

• 主ぬし

  head (of a household, etc.), leader, master

• 主語しゅご

  subject

• 主食しゅしょく

  staple food

• 主戦しゅせん

  advocacy of war

• 主筆しゅひつ

  editor-in-chief

• 主題しゅだい

  subject, theme, motif

• 主計しゅけい

  paymaster, accountant

• 主唱しゅしょう

  advocacy, promotion

• 主砲しゅほう

  main battery, main armament

• 主義しゅぎ

  doctrine, rule, principle, -ism

• 主因しゅいん

  primary cause, main factor

• 主犯しゅはん

  principal offence, principal offense, principal offender

• 主要しゅよう

  chief, main, principal, major

• 主役しゅやく

  leading part, leading actor, leading actress

• 主管しゅかん

  supervision, management, supervisor, manager

• 主査しゅさ

  chief examiner or investigator

• 主権しゅけん

  sovereignty, supremacy, dominion

• 主導しゅどう

  leadership, initiative, spearhead

• 主力しゅりょく

  main force, chief object, mainline

• 主におもに

  mainly, primarily, mostly, largely, chiefly

• 主婦しゅふ

  housewife, mistress (of the house), homemaker

• 主体しゅたい

  main constituent, core, nucleus

• 主宰しゅさい

  chairmanship, presidency, management

• 主流しゅりゅう

  (the) mainstream

• 主審しゅしん

  chief umpire, referee (soccer, boxing, etc.)

• 主幹しゅかん

  chief editor, managing editor

• 主演しゅえん

  starring (in a film, play, etc.), playing the leading part

• 主軸しゅじく

  main spindle, main shaft

• 主将しゅしょう

  commander-in-chief, supreme commander

• 主任しゅにん

  person in charge, senior staff, manager, chief, head

• 主眼しゅがん

  main purpose, chief aim, focus

• 主観しゅかん

  subjectivity, subject (philosophical), ego

• 主張しゅちょう

  claim, insistence, assertion, advocacy, emphasis, contention, opinion, tenet

• 主催しゅさい

  sponsorship (i.e. conducting under one's auspices), promotion, organizing, organising, hosting, staging

• 主人しゅじん

  head (of a household), proprietor (of a store), proprietress, landlord, landlady

• 主席しゅせき

  head, chief

• 城主じょうしゅ

  lord of a castle

• 神主かんぬし

  Shinto priest

• 船主せんしゅ

  shipowner

• 藩主はんしゅ

  feudal lord, daimyo

• 家主やぬし

  landlord, landlady

• 喪主もしゅ

  chief mourner

• 亭主ていしゅ

  household head, master, host (e.g. of a tea gathering), innkeeper, owner (e.g. of a hotel)

• 君主くんしゅ

  monarch, sovereign, ruler, liege (lord)

• 自主じしゅ

  independence, autonomy, self-reliance

• 株主かぶぬし

  shareholder, stockholder

• 地主じぬし

  landowner, landlord, landlady