Updated from 12:24 a.m. EDTNEW YORK ( TheStreet) -- The Bank of Japan on Wednesday kept its key interest rate unchanged at 0.1%, and said it plans to increase a lending program it introduced in December. Japan's central bank plans to double its short-term lending program to 20 trillion yen ($221.3 billion) from 10 trillion yen. The Nikkei 225 stock average in Tokyo rose 0.6% to 10,788.15. -- Reported by Joseph Woelfel in New York. Follow TheStreet.com on Twitter and become a fan on Facebook.