Here are some more examples of complex Japanese sentences for those with some experience in the language may find challenging:
あのかわいいねこはたくさんねています。 (Ano kawaii neko wa takusan nete imasu.) That cute cat is sleeping a lot.
ここはにぎやかで、いろいろなおみせがあります。 (Koko wa nigiyaka de, iroiro na omise ga arimasu.) This place is lively, and there are many different stores.
ともだちといっしょにたのしいやすみをすごすことができました。 (Tomodachi to issho ni tanoshii yasumi wo sugosu koto ga dekimashita.) I was able to spend a fun vacation with my friends.
あのさむいくうきは、ゆきがふるよるによくみえます。 (Ano samui kuuki wa, yuki ga furu yoru ni yoku miemasu.) That cold air looks good on nights when it snows.
わたしのすきなしゅみはえをかくことで、いろんないろのえがかけます。 (Watashi no suki na shumi wa e wo kaku koto de, ironna iro no e ga kakemasu.) By drawing pictures, my favorite hobby, I can create pictures in many different colors.
あのころすはちゅうしゃがすきで、よくおおきなくるまをかわせています。 (Ano korosu wa chuusha ga suki de, yoku ooki na kuruma wo kawasete imasu.) That squirrel likes to cross the street, and often changes to a big car.
きのうはとてもたいへんなにちでしたが、みんなががんばったおかげで、できました。 (Kinou wa totemo taihen na nichi deshita ga, minna ga ganbatta okage de, dekimashita.) Yesterday was a very difficult day, but we were able to do it thanks to everyone's hard work.
あのうさぎは、かわいいおはなしをかたってくれるので、みんながすきです。 (Ano usagi wa, kawaii ohanashi wo katatte kureru node, minna ga suki desu.) That rabbit is liked by everyone because it tells cute stories.
しょうらいのゆめは、とてもおおきなせかいをつくることです。 (Shourai no yume wa, totemo ookina sekai wo tsukuru koto desu.) My dream for the future is to create a very big world.
わたしたちは、あのときのことをずっとおもいだしています。 (Watashitachi wa, ano toki no koto wo zutto omoidashite imasu.) We always remember what happened at that time.
We encourage you to practice these sentences, and inspire you to create your own variations by changing the vocabulary