Working as a diplomat has always been hard, but the further back in history you travel, the tougher it is to even travel internationally.  In spite having served during the 8th Century, Abe no Nakamaro managed to successfully manage hist post in Tang China.
make their way back to Japan
 via the kingdom of Bohai.
a los emisarios naufragados y los
enviara de vuelta a Japón por Bohai.
e assim voltaram para o Japão
através do reino de Bohai.