the dictionary i looked up that has more than 12,000 characters for japanese in the database but didn't have them. also the chinese dictionary i looked up didn't have them >< so i had to look them up in another chinese dictionary. i asked my chinese friends who speak cantonese and mandarin and they didn't even know these characters. they must not be in regular use in china.
in the 大漢和辞典 (
大漢和辞典 - Wikipedia) there are over 50,000 characters so it is certainly not a matter of them not existing in japanese. whether they are ever used is another thing all together.. haha. without being able to looking them up in said dictionary it would be hard to find out their pronunciation.