I like thought of a logline, but I wish you could bring in further details about your concept through Synopsis and the thought of an anime might do the work with Japanese animation crew to make it happen if you understand Japanese. I like the risk your taking on the concept though. Make sure you hire the translator before you'll meet with the executives and animators in Japan. Just giving you an advice on meeting people internationally when they don't speak English. Otherwise, Keep doing your very best.