"I bought a Shinkansen ticket."

Translation: しんかんせんのきっぷをかいました。

[Pikachu025]

For your reference:

The Shinkansen network: 「しんかんせん」 : 「新幹線」 is a network of high speed trains in Japan. Shinkansen literally means "new trunk line" in Japanese.

They are more commonly known as "bullet trains" : "dangan ressha" : 「弾丸列車」 : 「だんがんれっしや」 , with speeds of upto 320 kilometres per hour.

[TakashiNAK12]

Though particles are often
dropped in conversation, it is not common to say Shinkansen Kippu(新幹線切符).
Shinkansen no Kippu(新幹線の切符) is much better.

[kbreddit]

In regular speech would "新幹線切符" be fine or would の be required?

[victoriawl93]

In conversation many particles are dropped, so it's fine for speaking

[Untitled_Name]

Dropping particles is very informal though, so do it with care

[oppikoppi]

Not in this case.

[qimerra]

Seconded, not in this case. Possessives require the の

[Moosey007]

新幹線の切符を買いました。Please can we allow kanji as well.

[Paul252681]

In Japanese class we call the しんかんせん the bullet train. Not sure why Duolingo doesn't use that as a translation.

[PIEROS16]

can't you say チケット instead of きっぷ ? which word is more used in japan?

[andjustzen]

Personally, I'd always use きっぷ for trains and チケット for something like a movie.

[drigoro2000]

新幹線の切符を買った

[Lloyd76445]

Shikansen-no-ki'pu wo kai-mashi-ta.