>Yumland is called "Ajina" in Japan, implying that it's mainland Asia as a whole
>Chinese and Indian elements coexisting supports this
>if it's just China and India, the total population is 2.8 billion
>if it's all of Asia minus Japan, the population is 4.85 billion
>Shadowman killed EVERY navi in Yumland. Even if we assume only half of the population had navis, that's still 1.4 to 2.4 billion deaths.
And he got away with it. He even became Lan's friend in Team Colonel.
Navi lives don't matter, canonically.