Because unlike shoujo manga, it goes past meeting a guy and living happily ever after which only takes 2 volumes.

The more popular it is, the longer it becomes.

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♪MONSTARR~ will eat all your cookies and steal your bishies~♪ Φ_Φ

As stated before, generally speaking, it doesn't take that long to tell a love story well in a shoujo. Whereas, most the big time shounen, build upon a foundation not that of reality, but a fictional world where they can expand and add as much as they want to it in order to keep it interesting. Throw money and profit into the mix, and you have even more reason for the mangaka to keep making it longer. Naruto probably could have been easily told in 100 chapters, however, what money would that make them? Plus most fans like good things to last. So simply put, normal shoujo mangas can't support themselves for that many chapters and for that length of time. The reader wants conclusion to the love triangle and melo-drama, not going round and round in circles.

Now as far as something not being able to be interesting more than 50+ chapters, well, I think thats more personal opinion than fact. Some people like longer stories that keep going on without conclusion, other people like to see the ending. It also has to do with how well its written, and how well the mangaka keeps your attention. On a lazy sunday, I could easily knock out 50 chapters in a sitting for a manga (then again I read abnormally fast) and still be wanting to read more.

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I won't say every long series is or isn't interesting. For me Inu Yasha isn't. Naruto isn't. Both have an amazing start but we feel the authors drag them for too long, and the reason: they're long but the plot gets poorer (esp Inu Yasha). But Bleach & One Piece are still good imo.

Generally, as long as the story is still nice, it's normal, and nice for A level shounen to be much longer than A level shoujo. It's not that the longer ones are better/greater... than the shorter. Shoujo & josei are nice to read, I like many popular series like all by Yazawa, Dengeki Daisy, Lovely Complex, Kimi ni Todoke, PGE... but to make me a devoted fan? Shounen only We have different tastes duh, we can say for me shounen is better than shoujo, but it's snobbish to say I like shounen & seinen, that makes me better than you shoujo fans. Shounen is longer, that's the way shounen & shoujo are (like Drab stated). Though shounen can still be short and enjoyable, like Death Note & Black Cat. I think the average ideal for shounen is 30-40 vols. And 10-20 for shoujo. But of course there're some great exceptions afterall at the end of the day it's all about if the story is interesting.

lets be honest, shounen, seinen is mostly action, action can go on for a long time if you follow the arcs and saga's separatly but yes your mostly right...however i can't stand most shoujo! some good ones yes i'll praise that much...

But when im reading alot of shoujo the main trends i see are....A CAST of only GIRLS AND EXTREMLY MANLY GIRLS (yes i did say it, the guys mostly look like girls). Some shoujo's have the main charactors looking like zombies no emotion whatsoever BUT this look is COOL. It just looks like this sterelised girl or guy (same thing) walking around like a zombie, i dunno maybe its just me but most shoujo's have these qualities. I'm not bothered by the rosey backgrounds, glitter, bubbles, daizies, sunflowers and stuff too much but it realy makes it unberable for a guy like me to read any shoujo. only ever read few or so to know...

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I believe in letting people do as they wish, as do I myself. Sometimes, of course, what I wish to do is kill them and they do not wish to die. This gives life interest.

Shouldn't the question be "Why are most Japanese Popular Shounen so LONG?"

It's ultimately the Japanese audiences that decide what manga keeps going and what manga gets canceled. Though it would be awesome if American audiences had a say in what stays and what goes, cause then Gun Blaze West would still be ongoing...

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Beacouse the recepie for keeping alive a shounen is easy:

-Add more battles
-Add a new enemy a bit more powerfull than the previous one
-Revive a dead strong enemy with some stupid hocus pocus
-Revive a dead strong enemy with the ridiculus cliche "u killed my clone" "that was my brother" "I made u belive I was dead" crap
-Add a new tournament
-Add more b.s and so on etc.............
-Get the main character search for a new weapon, sword, technique, etc..........

This applies for all mangas:
-Take the main characters to a beach (here comes the fan service ¬¬)
-Do flash backs of main characters history

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<b>Reading</b> <!--m_gen--><a href='http://www.mangaupdates.com/series.html?id=1859' title="Click for series info"><u>Love Lucky</u></a><!--m_gen_end--><BR><b>Recommended</b> <!--m_gen--><a href='http://www.mangaupdates.com/series.html?id=5920' title="Click for series info"><u>B Gata H Kei</u></a><!--m_gen_end--> <3 <!--m_gen--><a href='http://www.mangaupdates.com/series.html?id=24665' title="Click for series info"><u>Conveni-N</u></a><!--m_gen_end--> XD<BR><!--img--><img src='http://myanimelist.net/signature/chulian1819.png' border='0' alt='User Posted Image'><!--img_end-->

Couldn't be any truer.

There is always something "new" that pops out of no where (not necessarily something new as in brand new, but recycled repetitive crap).

A ridiculous statement. So often untrue that it makes me sad.

Just because you don't like certain series, doesn't mean the rest of the world feels the same.

There are A LOT of people in the world with shitty tastes - but that's just my opinion.
If it were up to me, Inuyasha would've ended by chapter 5 (Yeah, I despise it), but as you may know, it ran for ~12 years.

Some people are more easily pleased than others. That's why certain "shit" series run for a very long time.

So no, it's not a ridiculous statement

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Everyday I'm tumblin'

I have to agree some with Randomfart. Just because something is popular doesn't mean it's interesting. It's like cup o'ramen (ex Nissin brand), it's not interesting, tasty, healthy or filling, but people still buy it anyways (most of the time not for price).

In reference why shounens are most of time longer then shoujo, alot of shounens run in a weekly magazine while most shoujos are either bi weekly or monthly. This means more volumes come out in a quicker amount of time. Also movement takes more panels then dialog.

Please do not presume to speak for the rest of the world. Why do you think we buy it in the first place?

Oh, we buy instant ramen because our taste buds have been too inundated by strange things to know what's good and because our useless otaku budgets can afford nothing more~

No no no.
You guys need to get this through your heads.

If something is POPULAR, it means that it INTERESTS a large number of people.
This means that many people find it INTERESTING.

Look at Twillight for example.
It is shit writing.
Yet, it is batshit crazy popular.
Why?
Because silly little teenage girls all over the world find it INTERESTING (only God knows why)

The rest of the world may not share the same tastes as you do.
GET.THIS.THROUGH.YOUR.HEADS.

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Everyday I'm tumblin'

In essence you're contradicting yourself here, by denying a universal view. However i doubt that was your original intention.

It seems to me you're confusing "interesting" with "entertaining" there's a fine line but the former is often perceived as something a bit more intellectual.

For instance, many anime are designed to please only a certain type of consumer to get reliable profit. Which results in the same ideas being recycled and you end up with something along the lines of "Queen's Blade" which i hope you wouldn't describe as "interesting" but (if you really must) "entertaining" instead. In turn something like Death note i feel would be better described as "Interesting".

Also there are certain problems with using the logic that comes with "something is of interest (interests), hence it's interesting". I might for example have an interest for food, not because i find it interesting but because i like to be able to make tasty food for myself. In the same manner a viewer might have an interest for an anime because he likes the humor in it, but might consider the anime in general "uninteresting".

because little boys in japan like to read manga more than little girls probably. and little kids are happy with anything