1. Visas and Permits:
Intracompany Transferee: Activities on the part of personnel who are transferred to business offices in Japan for a limited period of time from business offices that are established in foreign countries by public or private organizations with head offices, branch offices, or other business offices in Japan and who engage at these business offices in the activities described in the "Engineer" or "Specialist in Humanities/International Services" sections of this table. Applicants must fulfill certain conditions concerning personal history and work status.
http://www.us.emb-japan.go.jp/english/html/travel_and_visa/visa/faq.htm#q5
2. Relocation allowance and housing:
Education: 24,650 x 3 kids according to http://aoprals.state.gov
Housing: 88,000
3. Language and Cultural training:
Rosetta Stone
Available and affordable – cultural training courses
4. Spousal employment concerns:
http://community.asij.ac.jp/NetCommunity/Page.aspx?pid=200&srcid=-2
5. Health/Medical/Insurance issues:
Emergency Medical Expenses benefit: $50,000, $100,000, $250,000 or $500,000
Deductibles: $100 or $250
$100,000 Emergency Medical Evacuation benefit
$20,000 Repatriation of Mortal Remains benefit
$25,000 Accidental Death and Dismemberment benefit
Physicians' fees and hospital expenses
Special trip expenses for accompanying travelers, 18 years of age and younger, to home residence
Special trip expenses for bringing a companion to your side
Optional Hazardous Sports Rider (not available to residents of Washington state)
MEDEX Worldwide Travel Assistance Services additional detail
6. Compensation and incentives:
Wife receives $6,000 a year pension match, 15% a year salary bonus or approx. $28,000
7. Education for the children:
Included in #2

Canon Inc. is a Japanese multinational corporation that specializes in the manufacture of imajing and optical products, including cameras, photocopiers, and computer printers.  It is headquartered in Ota, Tokyo

Sony Corporation

Sony is a multinational corporation headquartered in Tokyo, Japan. Sony is one of the leading manufacturers of electronics, video, communications, video game consoles, and information technology products for the consumer and professional markets.

Toyota Motor Corporation

Toyota Motor Corporation is a multinational firm headquartered in Japan. As of today, Toyota is the world's largest auto manufacturer. Toyota's diverse lineup ranging from large trucks to hybrids paired with lean production methods and "Just in Time" inventory allows them to remain a viable corporation in these tough economic times. This company employes thousands of people worldwide.