Don't be a 45-degree fool

The "45 degree" is often taught as the standard angle for L/R alternate cuts during kiri-kaeshi, but very stupidly, without clarifying where the pivot should be positioned or where exactly the cuts should land as the result.

Depending on the position of the pivot, the "45 degree" method can be pretty dangerous (& incorrect).

This is the reason why some people bash their partner's head almost from side to side while kiri-kaeshi, bursting the blood vessels in their partner's eyeballs, causing blood-shot eyes and mild concussion.

This isn't OK. This is dangerous and stupid.

As above, a valid 'Ippon' by L/R Men cuts are only awarded for the strikes no lower than the top-strings on a Men.

There's no such cut as "bashing from the side" exists, so, don't do it during kiri-kaeshi. Where that came from?

Be reasonable, don't be a 45-degree fool.

Head injury risk

A top-level Australian cricketer died after a hard ball hit the back of his head.

Kendo helmet does not offer any protection around the same area.

http://www.bbc.co.uk/news/magazine-30206381

Kendo helmet only protects its narrow front, somewhat limited protection on the top, virtually none on the sides & back.

The rule of thumb is that you should launch a strike to the head only when you can see the red rim of your partner's helmet.

Launching a strike to the head on any other angle is regarded as not only dangerous but also disrespectful and unworthy character of practising kendo.

The logic is that if you cannot be asked to play by the rule, you shouldn't bother about kendo at all. Kendo expects high moral standard from its participants.

Kendo is supposed to be a safe discipline as long as the basic rules are followed, but at the same time it can be dangerous when the basic rules are ignored because the armour is designed based on the assumption that all the participants follow the rules.

Look after your/others head - that's where the happy thoughts are made.