Translation guide
Expressions for describing different stages, aspects, or steps of a process, situation, or life.
Referring to distinct periods or steps within a development, project, or lifecycle.
The most common and versatile word for 'phase' or 'stage' in a process, plan, or development.
The project has entered the next phase.
This plan is divided into three phases.
Often used for phases in games, matches, or critical turning points in a situation. Slightly more formal or analytical.
The match entered a new phase.
Loanword from English, common in business, IT, and project management contexts.
The first phase of development has been completed.
Referring to different sides, features, or dimensions of a topic, problem, or personality.
Referring to the changing appearance of the moon or planets.
Referring to phases in one's life, such as childhood, adolescence, or a difficult period.
段階 is the safest choice for 'phase' in most contexts (projects, processes). 局面 is better for critical junctures or game/match situations. フェーズ is a direct loanword common in business and tech, but may sound jargon-like in everyday speech.
The English phrase 'various phases' is often best translated by choosing the right noun for 'phase' and adding さまざまな or いろいろな. A direct translation like さまざまなフェーズ is possible but can sound unnatural outside of business contexts.
We need to examine every phase of the problem.
There are various phases to things.
月の満ち欠けは昔から農業の目安とされてきた。
The phases of the moon have long been used as a guide for agriculture.
彼は今、人生の新しいステージにいる。
He is now in a new phase of his life.