hashira react to modern era

Well, several hashira died. For example, Gyomei Himejima sacrificed himself in a fierce battle.

Yes, Tanjiro eventually becomes a Hashira in the manga after going through many challenging battles and growth.

Not all of them died. Some Hashira managed to survive until the end of the manga.

Inosuke doesn't become a Hashira in the manga. The story progresses with him having other significant experiences and achievements instead of achieving that specific position.

It's hard to give an exact number. Different story arcs and battles led to the deaths of multiple hashira. Some died heroically, while others met their fate in unexpected ways. The count changes as the manga progresses.

Yes, she does. But it happens under specific circumstances and for particular reasons related to the plot.

Definitely not. Genya remains outside the ranks of Hashira throughout the manga. This is because of a combination of factors such as his skills, experiences, and the overall direction of the story.

Modern and contemporary are relative concepts that are usually used to describe the current state of an era or society. In modern society, the word "modern" is usually used to describe the end of an era or country. It is usually at the end of the 19th century or the beginning of the 20th century. For example, 1848 is the starting point of modern China. 1911 is the beginning of modern Chinese history. The term "contemporary" is usually used to describe a certain era or society in the present or future. Its definition may vary due to cultural, historical, political, and other factors. Generally speaking, the term 'contemporary' may refer to certain characteristics or events that the current era or society is experiencing, such as technology, culture, economy, politics, etc. Therefore, it was not the current era but the modern era. Although the modern era may have ended, the current era is still ongoing.

Quite a few. Some of the notable Hashira who died include Gyomei Himejima and Shinobu Kocho.

It starts around chapter [X]. But the exact point might vary depending on different translations and editions.