I would throw out the high div, the last 3 too, scale the rest up accordingly and then throw it into a backtest. The Japan share is already quite high. But if you like it... that's just my view of things. You can also throw this combination into a backtest for comparison (if they are possible far enough back) and compare the results. (Attention: the period under consideration should be the same), less than 15 years makes little sense) could therefore be difficult in your case.
