This is the 2445th most frequent Japanese word.
三菱
Mitsubishi: A Japanese company name meaning "three water chestnuts," represented by its three-diamond logo.
In this sentence, '三菱' refers to the name of the company 'Mitsubishi'.
三菱自動車は日本の有名な自動車メーカーです。
Mitsubishi Motors is a famous automobile manufacturer in Japan.
Here, '三菱' is used as part of the proper noun '三菱銀行', denoting a financial institution.
私は昨日三菱銀行で口座を開設しました。
I opened an account at Mitsubishi Bank yesterday.
In this context, '三菱' represents the corporate entity, referring to a conglomerate known for its presence in multiple industries.