Why does iwasaki believe that japan must keep foreigners out of the coastal trade ?

Iwasaki, a historical figure in Japan, might have had various reasons for advocating keeping foreigners out of coastal trade. During Japan's period of isolation in the 17th to 19th centuries, policies were implemented to restrict foreign influence and maintain national autonomy. Here are a few potential reasons:

1. Protectionism: Iwasaki might have believed that restricting foreign involvement in coastal trade was crucial for protecting local industries and businesses from competition. This protectionist approach aimed to safeguard domestic markets and prevent foreign domination.
2. Preservation of Culture: Japan during that time had a strong emphasis on preserving its cultural identity. Limiting foreign influence in trade was seen as a way to safeguard traditional values, practices and customs.
3. National Security: There could have been concerns about national security and the potential threat posed by foreign entities gaining access to Japan’s coastal regions. Limiting foreign presence might have been seen as a way to protect against espionage or external interference.
4. Control of Resources: Managing and controlling resources within the country could have been a motivation. By keeping foreign involvement at bay, Japan could regulate and manage its resources without external pressures or exploitation.
5. Political Stability: It's possible Iwasaki believed that limiting foreign involvement would help maintain political stability and prevent conflicts that might arise from interactions with foreign traders or powers.

Iwasaki's motivations may have been a combination of these factors, shaped by the socio-political and economic context of Japan during that period.