sentences:  The largest, and perhaps most famous, "Nihonmachi" of the period was that in the Siamese port city and royal capital of Ayutthaya, whose head, Yamada Nagamasa, bore prominent posts and titles in the royal court.Yamada led an army of 700 Japanese, and took part in suppressing rebellions, civil wars, and succession disputes; he was also allowed to control monopolies over particular goods, such as deerskin, and was given at least nominal governorship of a few provinces at various points.On the other end of the spectrum, though the port of Tonkin in northern Vietnam played an important role in the region's silk trade, the local Trinh authorities actively discouraged the formation of a "Nihonmachi" there.