便利|べんりbenri[1]atamadaka (head-high)

1. na-adjectiveconvenient; handy; useful
   電話でんわは便利べんりなものである。↗

   The telephone is a convenience.

• Synonym重宝ちょうほうCasualColloquial. For a thing that works well and often comes in handy, as in 「重宝している」; centers on the user's own feeling of it being useful.
• Synonym便宜べんぎWrittenWritten. Convenience, benefit, or special accommodation, as in 「便宜を図る」; a formal prose word.
• Synonym役立つやくだつNeutralA verb: to be useful or to work, as in 「生活に役立つ」; stresses the effect something produces rather than convenience.
• Synonym利便りべんWrittenWritten. Mostly seen in 「利便性」; describes how convenient transport, facilities and the like are.
• Synonym好都合こうつごうNeutralNeutral. Timing or conditions that happen to suit you, as in 「好都合だ」; stresses being favorable to you rather than handy.
• Synonym簡便かんべんWrittenWritten. Simple and trouble-free, as in 「簡便な方法」; stresses that a procedure or method takes little effort.
• Synonym有用ゆうようWrittenWritten. Useful and valuable, as in 「有用な人材」; leans toward formal prose.
• SynonymコンビニエンスWrittenLoanword rarely used on its own; mainly seen in 「コンビニエンスストア」.
• Synonym便利さべんりさNeutralNeutral noun for how convenient something is, as in 「便利さを追求する」; the noun form of 「便利」.
• Synonym軽便けいべんWrittenWritten. Light and easy to carry or handle; also refers to light railways. Rare in modern usage.
• Synonym助けになるたすけになるNeutralNeutral set phrase for being a help to someone; stresses helping a person out, and is not said of a thing being handy to use.
• Synonym便益べんえきWrittenWritten. Convenience and benefit together, mostly in economics and policy contexts, as in 「費用便益分析」.
• Synonym至便しべんWrittenWritten. Extremely convenient, as in 「駅至便」; typical of real-estate ads.
• Related有益ゆうえきWrittenWritten. Beneficial, doing you good, as in 「有益な情報」; stresses the benefit gained, not that something is handy.
• Related実用的じつようてきNeutralNeutral. Practical, geared to actual use, as in 「実用的なプレゼント」; stresses usefulness over convenience.
• Related有利ゆうりNeutralNeutral. Conditions that favor you or give you an edge, as in 「有利な立場」; about advantage, not convenience.
• Related効果的こうかてきWrittenWritten. Effective, with clear results, as in 「効果的な方法」; stresses how well something works.
• RelatedイージーCasualColloquial loanword: easy and relaxed, but also careless or sloppy, as in 「イージーミス」.
• Related機能的きのうてきNeutralNeutral. Functional with nothing superfluous, as in 「機能的なデザイン」; mostly said of design.
• Antonym不便ふべんNeutralAntonym. Inconvenient or a hassle, as in 「交通が不便だ」; the direct opposite of 「便利」.

Default to 「便利」 for anything convenient or handy. Use 「重宝」 for a thing you often find handy, 「役立つ」 or 「有益」 for useful/beneficial, 「好都合」 or 「有利」 when something works in your favor, 「簡便」 for simple, low-effort procedures, and 「実用的」 for practical things. 「利便」 appears as 「利便性」, 「至便」 in real-estate ads, 「便益」 in economics and policy. 「不便」 is the opposite: inconvenient.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. あるものが存在そんざいする、あるいはそれを使つかうことによって都合つごうが良よいこと。