You might be interested in threads from the FAQ sections on "Sakoku aka Edo Period Japanese 'Isolation'" and "Sakoku and Dutch trade":
Why did the Tokugawa persecute the Christian population in Japan? - 16 comments, over 2 years old.
The commenters here explore and debate the multifaceted nature of Japan's "isolation" during the Edo Period.
How was the VOC able to get a trade relationship with Japan where other trading nations and companies didn't get access to Japan in trading? - 4 comments, over 2 years old.
The commenters in this thread summarize the Japanese perspective on the situation and why the country's rulers enacted such tight restrictions on foreign influence, particularly Christianity.
Why was the Dutch republic still allowed to trade with Japan during Sakoku, even though no foreigner was allowed to enter the country? - 1 comment, over 4 months old.
The lone comment gives a summary of the situation as a competition between various trading powers which the Dutch won that had all other powers expelled.
How did the Netherlands come to and maintain their exceptional relations with Japan during the Japanese period of isolation in the 17th through 19th century? - 3 comments, over 3 months old.
This thread goes into the Dutch experience in Japan and the heavy restrictions under which they traded with the Tokugawa Shogunate during the Edo Period.