Dublin Airport (DUB) is absolute chaos. From arriving to departing, it’s an airport I’ll definitely avoid in the future when possible.
When the Van Nuys LAX FlyAway handed me the wrong luggage when I was running late for an international flight, the first thing I did was run as fast as I can to catch the bus that just left while trying to call them on the phone. If you’re looking for a full detailed post …
You can take public transit into Tokyo from Haneda airport for around 800JPY with a few transfers. But in my experience, transiting through Tokyo with luggage is an unnecessary world of anxiety. For 1230JPY, you can get on the Tokyo Haneda Airport Limousine Bus and go directly to most destinations within Tokyo.