Let’s Get Down to the Nitty-Gritty!

VOA
Let’s Get Down to the Nitty-Gritty!
Summary
What is a nitty-gritty? Nitty-gritty is an informal rhyming compound word. It is not clear when it was started being used and why. The origin is said that it relates slave ships and slavery in America. Nitty-gritty means the most important part or basic truth of any situation or subject. The heart and soul of a matter, the gist of a conversation, the essence of an argument, the crux, the core, the bottom line or reality are also considered as its meaning. It shows the practical details that need to be finished also.
Words in this story
rhyming / two or more words with the same ​final ​sound, or the use of such words, especially  at the ​ends of ​lines in a ​poem or ​song. walking/talking
slave / a person who is the legal property of another and is forced to obey them.
Discussion
1. Are there any useful rhyming words in your language like nitty-gritty?
I think that there are some rhyming words in Japan though I am sorry I didn't know well. Anyway, I wrote it. What about this? Syusya means rejection and adoption.                                                                                    
I know that in Japan there are many useful repitition (reduplication) words. For example, dandan means gradually.                                    
2. When dealing with the problem, do you always get down to the nitty-gritty?
Yes, I do. I always try to get down to the nitty-gritty when dealing with a problem. Sometimes in a meeting, people begin telling many things that are only beneficial for them. Therefore, the meeting will take longer and the agenda will not be dealt accordingly. It is important to know the nitty-gritty of the things.