The Tokyo Olympics

For some reason, "Olympics" in English is both singular and plural.

For several reasons, I disagree with the plan thato hold the Tokyo Olympic are going to be held in this year for several reasonss this year.

This makes it more clear that you disagree for several reasons instead of that the Olympics will be held this year for several reasons.

First of all, the COVID-19 pandemic havesn't settled down yet.

At the very least, we should keep waiting until the vaccines spread all overations have been given to everyone throughout the country.

Second, most athletes wouldn't do their bests due to the lack of practices.

They require a sufficient period of time and competition among various athletes from foreign countries.

Furthermore, the Tokyo game iss are no longer profitable if it can't obtain the ticket fees and benefits from tourism.

The budget deficit must beis inevitable so that we have to give up the hope that we can recovering the construction costs.

In addition, sexist remarks ofby Yoshiro Mori, the president of the Tokyo Olympics organizing committee, have become highly controversial not only in Japan but also among foreign countries.

In my opinion, meaningless meetings and the authority of elderly people who have strong stereotypeical ideas as well as gender discriminationg behavior are really harmful into Japanese society.

I can't help but feel embarrassed to let foreigners knowabout showing how old-fashioned this country is to foreigners.

We have to deal with these issues by paying more attention ton unconscious discrimination.

For these reasons, the Tokyo Olympics should be postponed until the pandemic is over.

In addition, sexist remarks of Yoshiro Mori, the president of Tokyo Olympic organizing committee, becoame highly controversial not only in Japan but also amongin other foreign countries.

'in other' would sound a better than among :)
become> became as it has already happened

The Tokyo Olympics

I disagree with the plan that theo hold Tokyo Olympic are going to be held ins this year for several reasons.

First of all, the COVID-19 pandemic haven's not settled down yet.

At the very least, we should keep waiting until the vaccines have spread all over the country.

Second, most athletes wouldn't do their bests due to the lack of practices.

They require a sufficient period of time and competition among variousin different foreign countries.

"In" sounds better to me here, because you are describing a situation where the athlete is physically in foreign countries.

Furthermore, the Tokyo gGame iss will no longer be profitable if it can't obtain the[for Japan] if ticket fees and benefits from tourism cannot be obtained.

This sounds better to me, especially as it is not necessarily the Tokyo gaves that are obtaining benefits from tourism. I would also associate a phrase like "obtain the ticket fee" more with a situation where an actual person is collecting fees.

The budget deficit mustwill be inevitable so that we, and we will have to give up recovering the construction cost.

The combination of "must be" and "so that" sounds like you are introducing a statement about what should happen, which doesn't quite work here.

In addition, sexist remarks of Yoshiro Mori, the president of Tokyo Olympics organizing committee, have become highly controversial not only in Japan but also among foreign countries.

In my opinion, meaningless meetings and the authority of elderly people who have strong stereotypes as well asnd who participate in gender discrimination are really harmful in Japanese society.

"Have gender discrimination" tends to describe places or institutions more.

We have to deal with these issues by paying more attention on unconscious discrimination.

"Implicit biases" sounds more idiomatic than "unconscious discrimination" to me, but it might be different in other cultural settings.

For these reasons, the Tokyo Olympics should be postponed until the pandemic is over.

The Tokyo Olympics

The Olympics should be plural.

I disagree with the plan that the Tokyo Olympics are going to be held in this year for several reasons.

First of all, the COVID-19 pandemic havesn't settled down yet.

Hasn't settled down yet is the correct term. Haven't is past tense.

Second, most athletes wouldn't do their bests due to the lack of practices.

Furthermore, the Tokyo game iss are no longer profitable if it can't obtain the ticket fees and benefits from tourism.

In addition, the sexist remarks of Yoshiro Mori, the president of the Tokyo Olympics organizing committee, becoame highly controversial not only in Japan but also among foreign countries.

I can't help but feel embarrassed to let foreigners know how old-fashioned this country is.

We have to deal with these issues by paying more attention on unconscious discrimination.

For these reasons, the Tokyo Olympics should be postponed until the pandemic is over.

The Tokyo Olympics

I disagree with the plan that the Tokyo Olympics are going to be held in this year for several reasons.

First of all, the COVID-19 pandemic havesn't settled down yet.

Second, most athletes wouldn't do their bests due to the lack of practices. time.

They require sufficient period of times and competitions held among various foreign countries.

Furthermore, the Tokyo game iss are no longer profitable if it can't obtain the ticket fee and benefits from tourism.

In addition, the sexist remarks of Yoshiro Mori, the president of the Tokyo Olympics organizing committee, have become highly controversial not only in Japan but also among foreign countries.

In my opinion, meaningless meetings and the authority of elderly people who have strong stereotypeical views as well as gender discrimination are really harmful in Japanese society.

I can't help feeling embarrassed to letting foreigners know how old-fashioned this country is.

We have to deal with these issues by paying more attention ton unconscious discrimination.