My Tobishos are great. I got them from http://www.tetsufuku.com a few years back but the price has increased a bit .
Felcos are excellent but I prefer Tobishos because there’s no annoying little thumb catch that I’ve accidentally knocked in the past which then locks the secateurs. The catch on the Tobishos is sprung loaded and located at the end of the secateurs so when I pull it out of the holster in one movement I can also unlock them by rubbing the catch against my hip, and likewise when dropping them back into the holster, grip the secateurs to close, knock the catch against hip which springs back and locks the secateurs and then pop back into the holster. This is good when switching between different tools whilst thinning out a shrub for example. I might be using a folding saw or short handled loppers and interchanging between the tools quickly keeps the job flowing along nicely.
Definitely recommend getting a holster whichever secateurs you get as it keeps them to hand and reduces chances of losing them. I have a double holster containing secateurs and a folding saw.