April is the most popular month to visit Tsukuba, as it falls within the peak season from March to May. During this time, the region comes alive with vibrant cherry blossoms, attracting both locals and tourists eager to enjoy the stunning views and pleasant weather. The mild temperatures, typically ranging from 10 to 20 degrees Celsius, create ideal conditions for outdoor activities such as cycling along the scenic paths or leisurely strolls through parks like Tsukuba Botanical Garden.Visitors in April can expect a bustling atmosphere, with numerous festivals and events celebrating the beauty of the season. You'll have ample opportunities to immerse yourself in local culture, sample traditional Japanese cuisine, and explore attractions such as the Tsukuba Space Centre.For those looking to save a bit on accommodation, consider planning your visit in June, when prices for holiday rentals typically drop as the peak season winds down. While June brings warmer temperatures and the possibility of rainfall, it also offers a quieter experience, allowing for more intimate exploration of the area's natural beauty and attractions.Ultimately, the best time to book a holiday rental in Tsukuba depends on whether you wish to revel in the lively spring festivities or prefer a more tranquil and budget-friendly visit in June.