Luggage on highway bus

Good afternoon,

We (2 persons) plan to travel from Arima Onsen to Kyoto on the Hankyu Bus. I have some concern re the luggage we are allowed to transport. Here is their info:
gas space in the luggage bay is limited, some medium-sized or larger items such as suitcases, skis, etc., may not be able to be accommodated.h
https://www.hankyubus.co.jp/en/arima-kyoto.html
What size is usually the max?
I know we can utilize the luggage delivery from KIX to our next night hotel in Kyoto. But this will mean more time spent at KIX when we need to rush. Also, quite nervous about the luggage not being delivered 😅

Tq, Mel

FYI airport luggage delivery is very reliable, allow at least 2 days delivery.

https://japanbusonline.com/en/Luggage

carry-on
-Less than 10kg in total.
-Less than 1 meter in total exterior dimensions (length+width+height).
-Less than 0.027m3 in total.

checked luggage
-Less than 30kg in total.
-Less than 2meter in total exterior dimensions (length+width+height).
-Less than 0.25m3 in total.

Thanks for your response.

From this link https://japanbusonline.com/en/Detail/12800290001/0/5281090001/5261009/...

When I keyed in my route I came across gImportant Notice Regarding This Routeh which contains:
< Carry-on Luggage>
Passengers can bring one piece of luggage per person:
ELess than 10 kg in total
ELess than 1 meter in total exterior dimensions.( length+ width+height)
ELess than 0.027 cubic meters in total

No mention about Check-in Luggage.