とされている
to sarete iru
is considered to be; is regarded as
[Is considered to be / Is regarded as]
Connection: Sentence (plain form) + とされている
Usage: Expresses a widely held belief, common understanding, or established view. Used to present information as generally accepted knowledge rather than the speaker's personal opinion.
Examples:
日本語は世界で最も難しい言語の一つとされている。(Japanese is considered to be one of the most difficult languages in the world.)
睡眠は1日7時間が理想的とされている。(Seven hours of sleep per day is considered ideal.)
この地域は地震が多いとされている。(This area is regarded as having many earthquakes.)