Did Japanese leaders take into account the international repercussions of their policies in 1930? Do you think that the European war affected the...

I can offer
you my opinion, but my personal opinion would not be worth much. In dealing with a question such
as this, I would want to consult as many experts as possible.  Let me therefore dig around a bit
on the internet for you.  Here is some of what I found:

http://afe.easia.columbia.edu/japan/japanworkbook/modernhist/wwii.html

http://factsanddetails.com/china.php?itemid=59

http://www.globalsecurity.org/military/ops/world_war_2.htm

http://www.pacificwar.org.au/pearlharbor/pearloverview3.html

http://www.google.com/search?q=Japanese%20foreign%20policy%20in%20the%201930s&hl=en&prmd=ivns&biw=1138&bih=498&um=1&ie=UTF-8&tbo=u&tbm=bks&source=og&sa=N&tab=wp

http://books.google.com/books?hl=en&lr=&id=QJCybygKzJIC&oi=fnd&pg=PR9&dq=Japanese+foreign+policy+in+the+1930s&ots=HN8BfuWT_U&sig=6S3LX_4_m9K4MMtvG_iqbZC-xC0#v=onepage&q=Japanese%20foreign%20policy%20in%20the%201930s&f=false