Japan's Nikkei share average $SGX Nikkei 225 - main 2403(NKmain)$ , opens new tab hit a record high on Thursday, surpassing its 1989 peak after a year-long rally driven by cheap valuations, corporate reforms and investment flows diverted from a battered Chinese stock market.Here's what analysts and investors say:1. TSUTOMU YAMADA, SENIOR MARKET ANALYST, AU KABUCOM SECURITIES, TOKYO"For us traders, this marks the arrival of a new era. It feels like the stock market is telling us that we've finally escaped from deflation and a new world has opened up."Compared with 34 years ago, the make-up of the stock market is totally different. Today, looking at the Nikkei average as a profitable security, it's still quite easy to buy. 39,000 is just a waypo