Yellow highlighted bubbles on the chart are areas/levels where buying the Nikkei225 is attractive. Around 16200 and 16000. Clear divergence where price is expected to follow the indicator (yellow lines) are further suggesting a bullish move from these levels.
Because of the expected volatility on Wednesday 21st of September, when both the US and Japanese central banks are in action, the lowest level might be the safest to play.
Fundamentally, BOJ are leaning more towards continued stimulus of the Japanese economy, whilst the FED`s are preparing for tightening in the US.
This is mentioned because of the high correlation between this instrument and USDJPY. As long as risk sentiment is positive in the markets, USDJPY should rise together with Nikkei225.