A letter which was written in around 1213 and is possessed by Daigo-ji Temple has a description on Kagemori that 'Tokurosaemonnojo is silent those days, but is a person with extensive knowledge.'
醍醐寺所蔵の建保2年（1213年）前後の書状に景盛について「藤九郎左衛門尉は、当時のごとくんば、無沙汰たりといえども広博の人に候なり」とある。