This is the 4400th most frequent Japanese word.
品川
Shinagawa: A district in Tokyo, Japan.
品川 in this sentence refers to Shinagawa, a place and specific station in Tokyo. It is used as a proper noun indicating a location.
品川駅へ向かっています。
I am heading to Shinagawa Station.
品川 in this sentence refers to Shinagawa Ward, one of the 23 special wards in Tokyo. It is used as a proper noun indicating a residential area.
品川区は私の住んでいる場所です。
Shinagawa City is the place where I live.
品川 in this sentence refers to a brand or manufacturer keywords (like Shinagawa Lighting). It describes a product or entity associated with the named brand or origin.