Official Language in office

Some companies in Japan started to make English the official language.

What do you think about it?
If you agree to this, try thinking about the demerit.
If you disagree to this, try thinking about the merit.

Some people insist that
"To speak correct Japanese or Japanese ability is more important
for current Japanese people. Before starting English,
Japanese must have an opiniton and enough content to talk about,
and improve ability to transmit first."

I understand this idea very much,
but anyway such people will not start English forever,
because through communicating with non-Japanese people in English,
people notice that those skills are also important,
and they can get them through learning English at the same time.

Therefore, such people who say Japanese skill is first
are same as the people who do nothing.

Peope naturally study a thing or make themselves study it
by themselves (without being forced)
when they have such a circumstance.