A hidden gem often overlooked by tourists is Hokkaido's Shiretoko Peninsula. This region offers a rare peek into Japan's primal landscapes and wildlife. You could find yourself hiking through immense tracts of preserved wilderness, taking boat trips to observe wild bears fishing along the shoreline, or scanning the nutrient-rich waters for beaked whales. The weather here is more refreshing than in the south, perfect for outdoor escapades.

If you're a birdwatcher, venturing this far north might reward you with a glimpse of the elusive red-crowned crane, especially if you're up for the winter's flamboyant mating dances. Hokkaido also presents an excellent opportunity to understand the Ainu, the indigenous people of the northern islands. In the town of Shiraoi, you'll find the Upopoy National Ainu Museum and Park — an outdoor cultural museum where you can immerse yourself in traditional music and dance performances

The summer months in Japan are hardly devoid of fireworks: it's the season of festivals and merriment. Japanese fireworks are far from ordinary, showcasing a brighter and more intricate display than you'd find elsewhere, thanks to Japan's leading position in firework design.

The significant event of the summer season is Obon, a week in August when Buddhists honor their ancestors with spectacular fireworks and vibrant dances. Although the whole of Japan celebrates, a highlight is Awa Odori, a dance festival in Tokushima on Shikoku Island. This festive tradition, which started over 450 years ago, has evolved into a grand multi-day street parade. Everyone adorns a cool yukata (light cotton kimono) and savors kakigori while marveling at the fireworks by the riverside.

Your travel guide may romanticize climbing Mount Fuji, a feat possible only in July and August. However, based on personal experience, I'd suggest reconsidering. The mountain attracts such a crowd that you might find yourself in a continuous queue to the summit. The iconic mountain is best appreciated from a distance, particularly from the banks of one of the five surrounding lakes

Do note that Japan's rainy season typically hits the mainland in June, ushering in over 80% humidity. Most regions experience average temperatures around 25°C (77°F).