Toshiba, Toushiba
proper noun
The east lawn isn't some eastern lawn, it's in reference to the company Toshiba. Might be better to look at the reading first for this one.
とうしば
The readings come from the readings you learned with the kanji.
東芝のお客様センターから届いたメールは、全文文字化けしていました。
The email from Toshiba’s customer center was all garbled.