The Jan 2025 PI in Japan and Korea was just to equalise prices due to their weakening FX. I believe they will follow soon too because JP current prices are almost equal to our current (Pre-Increase) prices which will change tomorrow, 25-Apr.
JP now adopts a silent price increase (unlike last time by giving advanced notice of their JP website), so let's see tomorrow. Even if they don't follow the same timeline, I believe they will do soon enough. They're always more diligent to increase (or reduce) prices as far as I am aware