 As the system continued to strengthen, the JMA upgraded the depression to a storm at 1200 UTC and named it "Shanshan", a girls' given name submitted by Hong Kong.The HKO did the same at the same time, upgrading the depression to a storm.The storm quickly strengthened, being upgraded twice by the JMA on September 11, at 0600 UTC to a severe tropical storm and at 1800 UTC to a typhoon, becoming the seventh official typhoon of the season.