Yes, they are short, but have you had any other experience with Japanese sticks? These are so much thicker than normal Japanese sticks. Japanese (styled) sticks are usually very, very thin, these ones however are much thicker for being Japanese 😀. A full burn of one of these lasts me a good 30 mins. I even have normal, Japanese styled sticks, but made in China with old stock Wild Yellow Kyara, and I snapped a lot of those into like anywhere from 3.5-4 to 5.5 (6 max) inches and the bigger sized snapped ones can last 30-35mins, I think this is the materials used (Wild Kyara) in these sticks because they are very thin and last a long time. I even accidentally snapped one that I already snapped and it was around 2.5inches maximum maybe 2-2.2 and it lasted around 12-15mins. These sticks are to be appreciated with great respect. I bought 8 (7.77-8inch) sticks for £60, some tubes only have 6 for this price.
I love the Horin range, a lot, I need to burn a Genroku today, haven't burned any Horin's in a good while. I have a good collection of daily range sticks though, and 1 big box of a Daily Range premium stick (Tensei by Tennendo), and two small boxes of Gyokushodo luxury daily sticks the 沈香 - Jinkōh Yoesei (the highest end) and 沈香 - Jinkōh Hoen (the 3rd highest end) sticks. I am looking at getting Renzan next, then Sandalwood, then Kukai, then Omani Frankincense, then possibly Sandalwood and Musk (Kukai costs £102 for 450 sticks, Tensei cost £90. Kukai is the most expensive, Tensei is second). You should look at a vendor for Renzan box by Tennendo, they are £36 for either 400 or 450 sticks (I am sure it is 450) they use premium aloeswood.
Also, if you can, try coil incense, I have yet to try them, but I am planning on buying some from Kangiiten.