Still adjusting to life in Japan.

How does charitable giving work in Japan?

Not that the motive or amount of giving should be based on whether their is a tax deductible benefit but is their such a thing?

Are donations to a church deductible?
Major world wide charities? (UNICEF, Red Cross, Doctors without Borders etc) These organizations issue receipts but can you use them in Japan?

If you are an employee of a Japanese company, can you claim such donations and get a refund? If so, how?

Been googling and I am more confused than I started.