https://ja.m.wikipedia.org/wiki/藤宏子<-- Toei actress born 1950 according to this page.

Is the person that spells her given name using hiragana different? IMDb, which also has one page with all credits, says "born 1941" but I can't find other sources for it.

JMDb has separate pages but of course JMDb can be incorrect sometimes as well.

藤ひろ子: http://www.jmdb.ne.jp/person/p0306670.htm

藤宏子 (jmdb has it written 藤浩子 so there may be additional pages): http://www.jmdb.ne.jp/person/p0308380.htm