All lobsters are edible raw and Maine lobsters are just as safe (or unsafe) to eat as those special Japanese ones. Flavour will be different. As with most raw seafood, there is a small risk of Vibrio vulnificus infection (but a healthy immune system generally handles this, so it is a concern primarily if your immune system is compromised). Rather strangely 85% of victims are male, females are much less susceptible. Eating raw oyster (something I love) is the primary source of Vibrio vulnificus infection, fwiw.