After Eigaku became the deputy official court painter at the age of 57, he sometimes signed and sealed as 'kinmon gashi' ('金門画史') or 'kinmon gain daiichishi' ('金門画院第一史').
57歳にして禁裏（朝廷）御絵師御次席となってから落款に「金門画史」・「金門画院第一史」と記すこともあった。