Interesting comments from the 3 of you, thank you. I agree in general with all those conclusions. Yes, in the long term, if you decided to invest in diversified foreign equities being in Japan with JPY, and without considering a specific product, in general buying the cheapest unhedged all-world fund should be the standard advice. I really agree on that! And if you look at the title of this whole thread, I already assumed that strategy.
However, this current situation right now as we speak is pretty abnormal and extreme. Please, look at this JPY/USD chart for a few seconds. We are at this very moment at 30-year highs! So my whole idea is as follows: in this specific situation, until this extreme volatility resolves, for new purchases of MSCI-world type fund/ETF, and given that there's a very good hedged ETF as the one I showed, do you really find weird to hedge now?
I will insist on these previous premises also including your latest comments:
If the JPY/USD was in a historically more averaged position, I would choose the conventional unhedged low-cost fund. However, at this point, I started to think about hedging some time ago, and I surveyed the market looking for some adequate product. I only found one, which is the one I shared (2513), with only 0.2% fee and with a track record of about 6 years tracking the MSCI-kokusai index in USD really accurately, with small deviations below and above the original index of up to 5% (this is a short-term maximum value and NOT accumulated, in the long term the deviation is very small and averaged to zero). Then I recently decided to start buying this ETF with a strategy of keeping it while this situation persists. Nobody knows what will happen with JPY/USD, but during some sitill-undetermined time I will feel way more relief knowing that the JPY/USD can behave wildly (as in these 3 past years) and I will not feel it very much in this investment, at a very reasonable cost. This is risk management, and I can accept even a few porcentual points of opportunity cost in order to avoid tens of porcentual points of potential loss, which is not a crazy scenario at this moment.