Nikkei gains after upbeat BOJ survey but Greek woes cap rise

TOKYO, July 1 (Reuters) - Japanese shares gained on Wednesday after a central bank survey showed big businesses intended to increase capital spending at their fastest pace in a decade, but caution over developments in Greece limited gains. Confidence at big Japanese manufacturers unexpectedly improved in the second quarter and is seen rising further, the Bank of Japan's "tankan" survey showed, offering relief to policy-makers keen to jump-start the economy. The Nikkei share average rose