Kirk here, with something from Kuma Visit. When the internet is working well, Google image search and machine translation services may be even more useful that a sheet of this type. On the other hand, disasters often take out electrical power and may even disturb internet service so, if you’re worried about your ability to communicate in a pinch, printing something like this out and having it with you might be a good idea. If you have any special medical needs or other concerns you’d like to be able to convey in a disaster, it might also be good to have someone help you translate that into Japanese and print that out too in advance so you can point to it easily in an emergency.