Ive spent way too much time obsessing over straps for my M gear over the years, and honestly, the Q3 lugs are a bit fiddly. My main concern is always the metal-on-metal rubbing... I once ruined the finish on an M9 because I was lazy with protectors. For a Tokyo trip where youll be walking miles, you want something that wont dig in. In my experience, the Barton1972 Braided Leather Camera Strap is a tank but stays incredibly supple. It has built-in leather flaps so you dont scratch the paint. If you want something even more minimalist, check out the Tap & Dye Legacy Leather Camera Strap. Its hand-made and the leather quality is just on another level. I've used mine through some pretty humid climates and it just gets better with age. They ship from the US, so getting it to Seattle by Friday is doable if you order tonight.

Honestly, I have been through dozens of straps over the years with my M-bodies and now my Q3, and the stock strap is definitely a letdown for such a premium kit. I totally get the frustration with those Peak Design anchors too... they look way too tactical and bulky on a minimalist camera, plus I have seen them scuff the top plate over time. Since you are heading to Tokyo and need something that wont fail you, here are the two I swear by based on my own experience:

• Artisan & Artist ACAM-301N Silk Cord Strap Black

This is basically the gold standard for Leica shooters. It is hand-woven silk that feels like nothing else against your neck. It breathes really well, which is huge if you are walking miles through Shibuya. It is super flexible so you can wrap it around your wrist easily, yet it is incredibly strong.

• Rock n Roll Straps M-Leica Classic Black Leather 100cm

If you prefer leather, this is the way to go. The leather is crazy supple right out of the box so there is no stiff break-in period. It includes those little leather protector flaps so the split rings wont touch your lugs or the camera body at all. Since you are in Seattle, you might want to call Glazer's Camera today. They usually carry Artisan & Artist in stock, so you could just go pick it up and avoid the shipping stress entirely. That Q3 is gonna be a dream for Tokyo street shots, ngl I am a bit jealous. Have a killer trip.

Re: "Ive spent way too much time obsessing over..."

• I totally get that anxiety. Years back, a cheap split ring basically chewed through the lug on my M6. Never again. These days I only trust the Hawkesmill Westminster Leather Camera Strap because the leather is incredibly supple but the hardware is rock solid. Glazers in Seattle usually has premium stuff in stock if you cant wait for shipping. It's way safer for your Q3 than those plastic anchors.