What do you mean by quite a lot? In other words, if you open a foreign-related agency and only do German or Japanese, if you are very, very good, you can theoretically do medium-sized Japanese or medium-sized German.
Relatively speaking, there are more Gebi languages in Japanese.
As far as personnel saturation is concerned, German talents are the most scarce at present, and Japanese talents are relatively more than German talents.
As far as foreign affairs are concerned, English is always king, which is beyond doubt.
Although many companies can provide English translation of German/Japanese texts quickly at present, German and Japanese talents are also very promising, and this demand should last for a long time. The most promising talents are English-German bilingual talents or English-Japanese bilingual talents (of course, if you are proficient in three languages, you will be NB).