Regarding what #1 said about "Skip the cage! It is way too bulky..."

• I totally agree!! Seriously, you do not want to lug around extra weight when you are walking 20,000 steps a day in Tokyo. Keeping it light is the way to go! Since you are worried about the budget, there are some super cheap ways to keep your gear safe and running.
• ULBTER Tempered Glass Screen Protector for Fujifilm X-S20 is amazing insurance for like ten bucks. Totally keeps the screen safe from scratches in your backpack!
• Get a Anker 523 Power Bank PowerCore Slim 10K PD to charge on the go. It is way more versatile than buying five spare batteries and keeps you powered up for a full day of shooting!
• A K&F Concept Microfiber Cleaning Cloths 10-Pack is dirt cheap and keeps your lenses spotless in that humidity. Japan is gonna be incredible, just focus on the sights and enjoy that new camera!

Just saw this thread and wanted to share what works for me regarding safety. I've been super satisfied with a minimalist approach after years of overpacking. For Japan, I compared using the Peak Design Leash Camera Strap versus the Peak Design Cuff Camera Wrist Strap. Honestly, the Cuff is much better for navigating crowded shrines... it keeps the camera tethered to your hand so you dont worry about bumps or drops. For data reliability, I definitely suggest the Sony TOUGH-G series SDXC UHS-II V90 over standard cards. They are literally built without the fragile plastic ribs, so they wont break easily. I had a cheap card fail during a trip to Osaka once and it was heartbreaking. These are pricey but the peace of mind is worth every cent. You're gonna love the X-S20, it's such a capable little machine!

Skip the cage! It is way too bulky for a light Japan kit. To save cash while staying pro, here is what I use:

• Wasabi Power NP-W235 2-Pack Battery for cheap backup power.
• SanDisk Extreme Pro 128GB SDXC V30 because they are reliable and a total steal. Trust me, keeping it light is amazing! Use your money for ramen instead.

^ This. Also, I've been very satisfied with a minimalist setup. For my last Tokyo trip, the Peak Design Slide Lite Camera Strap worked perfectly for all-day carry without the neck strain. Technically, you want a fast card for that sensor, so I use the ProGrade Digital SDXC UHS-II V60 128GB for reliable write speeds. It's basically bulletproof and handles the 4K video better than basic cards.