[atchoo]

I don't consider two of those to be good comparisons to mass shootings of the "kill dozens of people in a couple minutes" variety.

The Saskatchewan stabbings were attacks at 13 separate locations across a sparsely populated reservation rather than a single mass casualty event.

The Sagamihara stabbings were attacks on sleeping disabled patients inside a care home. It reminds me more of Angel of Death type mass killings (by nurses / doctors). He considered it to be euthanasia and the weapon could have been a pillow - the mass killing was not down to the deadliness of the weapon but the passivity of the victims.

The Anqing attack is a better example - a single event against conscious victims. Nevertheless, mass stabbings across the whole globe are rarer than the daily mass shootings in the US.