I'd like to introduce a famous funny sentence that is famous in Japan.

It seems that you mightay call it a "word puzzle" in English as well.

You could also say "also" instead of "as well".

The sentence is filled within hiragana and pronounced in Japanese as "ni ha ni ha ni ha ni ha to ri ga i ru".

It i's common that peoplely interpret ited as "There are two chickens in the garden: にわ (garden) には、にわ (two) にわとり (chicken) がいる".

It is = It's
The sentence was grammatically correct, but this seems to flow more.

But, you can figure it oucomprehend it in several ways, since it doesn't be allocated any kanjihave any kanji allocated to it, (have no kanji), m. Moreover, "わ (wa)" and "は (ha or wa)" have a same pronounceiation in a particular situation.

You can also read it as the followsing:

"There areis an ancient clay figure, Mr. Niwa, and Mr. Ree in the garden: にわ (garden) に、はにわ (ancient clay figure) にわ (Mr.Niwa) と (and) り (Mr. Ree) がいる"

"An ancient clay figure, somea ring, and Mr. Ree are essential in the episode 2: にわ (episode 2) に、はにわ (ancient clay figure) に (and) わ (ring) と (and) り (Mr. Ree) がいる"

A couple of years ago, somea TV show examined how many ways it couldo make sense.

There are two chickens in the garden.

I'd like to introduce a famous funny sentence infrom Japan.

Or: "I'd like to introduce a funny sentence that is famous in Japan."

It seems that you might call it a "word puzzle" in English as well.

I think "word play" is a closer translation of 「言葉遊び」, but "word puzzle" also makes sense.

The sentence is filled withwritten in hiragana and pronounced in Japanese as "ni ha ni ha ni ha ni ha to ri ga i ru".

I think this could be better expressed as:

The sentence is written in hiragana and pronounced in Japanese as "ni ha ni ha ni ha ni ha to ri ga i ru", where each "ha" can also be pronounced as "wa".

Personally I think this way is a little better. What you're writing makes sense to me in Japanese but writing it out in English is hard.

But, you can figure it ouinterpret int several ways since it doesn't be allocated any kanji (have no kanji), mhave any kanji. Moreover, "わ (wa)" and "は (ha or wa)" have athe same pronounceiation in a particular situation.

"There are aAn ancient clay figure, Mr. Niwa, and Mr. Ree are in the garden: にわ (garden) に、はにわ (ancient clay figure) にわ (Mr.Niwa) と (and) り (Mr. Ree) がいる"

English speakers are somewhat divided on whether or not a sentence like this starting with "There are/is" followed by a list should use "is" or "are." Some would say you should use "is" because "figure" (the first item in the list) is singular, while others say you should use "are" because overall the number of items is more than one. There is a split over whether or not "is" is always correct or if "are" is formal and "is" is informal.

This split is why some people corrected your sentence to: "There is an ancient clay figure, Mr. Niwa, and Mr. Ree in the garden." I hear "is" more often, and I think most people would say it is correct. But, I think either way is acceptable.

This problem can be avoided by writing: "An ancient clay figure, Mr. Niwa, and Mr. Ree are in the garden." I think this is the best option as it avoids the grammar issue and does not sound as awkward.

If you want to read more about it, here are some articles about it:
https://www.grammarly.com/blog/there-is-there-are/
https://esllibrary.com/blog/there-is-there-are

"An ancient clay figure, some ring, and Mr. Ree are essential in the second episode 2: にわ (episode 2) に、はにわ (ancient clay figure) に (and) わ (ring) と (and) り (Mr. Ree) がいる"

A couple of years ago, some TV show examined how many ways dof interpreting the sentence make sense.