Sounds like a great itinerary! Here are some tips and considerations based on your plans:

Pocket Wi-Fi: It’s advisable to reserve pocket Wi-Fi in advance, especially during peak travel seasons. You can usually pick it up and drop it off at the airport. Having Wi-Fi will be very useful for navigating around the city, looking up information, and staying connected.

Transportation pass: If you’re planning to use public transport extensively in a single day, a day pass may be worthwhile. In Osaka, you could consider the Osaka Amazing Pass which includes unlimited rides on Osaka’s trains and buses, and also gives you free or discounted entry to many tourist attractions.

Universal Studios Express Pass: This pass can be a time-saver, especially if the park is crowded. It allows you to skip the regular lines for certain attractions. But note that it is not included in the regular admission ticket and must be purchased separately.

Power adapter: Japan uses 100v power outlets with Type A and B plugs. If your devices or power cords aren’t compatible, you’ll need a plug adapter and potentially a voltage converter, depending on your devices. Make sure to check this before you leave.

Money: Remember to have some cash on hand, as not all places accept credit cards, especially smaller restaurants and shops.

Clothing: Check the weather forecast before your trip and pack appropriately. Japan can have varying climates depending on the time of year and region.

As for the Umeda Holic Hotel, it is conveniently located in Umeda, Osaka’s central business district. It has good access to several railway lines and subway stations, making it convenient to reach Universal Studios, Dotonbori, and Tsuruhashi Korea Town.

Remember to check if any travel advisories or COVID-19 related protocols are in place during the time of your visit. Safe travels!