Don't forget these...
Tsunehisa Hamono is a brand located out of Tosa, Japan. Their aim is to bridge the gap between bringing consumers quality handmade knives, at an affordable price. Because not everyone wants unnecessary bells and whistles driving the price up of their knife when all they want is solid build and good performance.
SRS13, you're probably thinking that sounds like a chemical formula. You're partially right! SRS13 is part of a series of offerings from what we call high speed powdered steel (HSPS). Basically a concoction of ingredients brought together in perfect metallurgy harmony to produce one of the most corrosion resistance knives out there. To get all sciency and geeky, the grain structure is ultra fine and the carbide composition keeps this steel extremely sharp for a very long time, outlasting other HSPS like SG2/R2.
A Suehiro CERAX 1K whetstone will cut this steel easily, keeping sharpening manageable as you maintain the edge by regularly stropping with diamond compound. That is our recommendation to ensure your edge stays sharp for up to 3 months of heavy use on the line, roughly equivalent to 1+ years for you home cooks.
A 150mm petty, also called in some parts of the world a sandwich knife, is the absolute ideal length for any work you need to do putting together a sandwich. Slice open your bread, cut your cherry tomatoes, cut your lettuce, cut your cured meat, you get the drift. If you had to have one petty in your kit, we believe 150mm is the way to go.