Adapting to the water change

I'm back in Japan 2 weeks now. Every time I travel between Japan and my home country of Ireland for an extended period of time, it takes time to get used to the differences between the water in both countries. 

Japan has soft water and Ireland, where I spent the last 5 months. has hard water. They look the same, but they taste different and they are different to the skin and hair too. My hair has started to fall out this week, which always happens a couple of weeks in. I think It's just my body readjusting and typically it doesn't last long. 

But one thing I can't readjust to is the taste of (black) tea in Japan, because of the soft water. Soft water is supposed to be better for things like cooking and drink making, but when it comes to tea. I strongly disagree I rarely drink tea in Japan because, even using the same tea bags, it does not taste as nice as in Ireland. My hair will readjust to soft water, but I don't think I'll ever adapt to soft water tea!