Kyushu JR Pass & Sanyo Shikansen

I am planning a trip from Hakata to Kokura, and buying the Kyushu JR Pass. I'm looking at the Hyperdia website for the train routes. But how do I know which Shinkansen trains running on the Sanyo Shikansen route to avoid? Is it true that I only need to avoid the Nozomi & Mizuho lines?

The Sanyo Shinkansen is not covered, at all! You should take limited express, rapid or local trains between Kokura and Hakata, instead.

The coverage area is explained here:
http://www.japan-guide.com/e/e2361_05.html

Does it mean when travelling from Hakata to Kokura, I'm not allowed to all types of Shikansen?

How about the Kodama and Sakura shikansens?

No shinkansans north of Hakata.

As stated on the official page for the Kyūshū Rail Pass (https://www.jrkyushu.co.jp/english/railpass/railpass.jsp):

JR Kyushu Rail Passes do not apply to Shinkansen (bullet train) rides between Hakata and Kokura since this portion is a part of the Sanyo Shinkansen operated by the JR West.

That said, Kokura is only 50 minutes or less away from Hakata by limited express train, so travel time shouldn't be a major concern unless you're working with an extremely tight itinerary.

Cheers.

thank you all for your clarification. I understand now!

Hakata Station and Kokura Station are connected by both Shinkansen and non-Shinkansen lines.

: The Sanyo Shinkansen, which is operated by JR West.
: The Kagoshima Main Line, which is operated by JR Kyushu.

On the Kagoshima Main Line, Hakata and Kokura are connected by Limited Express Sonic in about 40 to 65 minutes, from morning to night.
(You can choose also a slower service such as Rapid.)

Among the three versions of JR Kyushu Rail Passes, All Kyushu Area Pass and Northern Kyushu Area Pass cover this non-Shinkansen section, including when you use a Limited Express service.

JR West has nothing to do with JR Kyushu Rail Passes, so these passes are not valid on the Sanyo Shinkansen.

"Nozomi" "Hikari" "Kodama" "Mizuho" "Sakura" and "Tsubame" are names of Shinkansen train services; none of these proper nouns refers to a Shinkansen line.
There is neither Mizuho Shinkansen line nor Sakura Shinkansen line.