Cooking while hiking in Japan

Hi everyone, we’re traveling by bike, but the same question comes up for hiking: what simple products can we find in towns or villages to eat/cook and get enough nutrition for physical effort, all while keeping costs affordable? Otherwise, where can we find inexpensive dietary supplements? Since I’m on cortisone, I have to be careful about what I eat. Thanks in advance, Aichatou

Hi there, what about taking Chinese noodles and soup packets? They’re super light, which is why I always bring them for several days.

Ideally, I'm looking for simple, high-energy, and less processed food. We'll be self-sufficient on bikes, so we'll be loaded down.