Osaka is the closest so far to Japanese jute (asanawa) which is the 'gold standard' of serious riggers but comes with a champagne price tag. The lay (twist), weight and density is almost identical which gives it superb flexibility and handling right off the reel. However, Osaka has around up to twice the number of yarns making it much smoother.
Due to the loose lay (twist), we only recommend dry treatment. I advise against wet treatment as there is no benefit and it is all to easy to damage loose laid rope such as this. In some recent break tests by Fetlife members, Osaka was comparable with the best Japanese ropes and better than some. Surprisingly, Osaka is my strongest jute rope by diameter.
6mm: Each of the 3 strands is made from 24 yarns. To allow for treatment and any stretching due to use, the off-the-reel diameter is about 6.6mm. The weight is 19.3 per meter.
5mm: Each of the 3 strands is made from 8 yarns. To allow for treatment and any stretching due to use, the off-the-reel diameter is about 6.5mm. The weight is 12.6 per meter.
This combined with the lower density creates a fast, flickable rope which will make your ties, knots and frictions look very clean and sharp. Supplied in 8m (26ft approx.) and 10m (33ft approx.) lengths finished with a simple knot. The fibre is a pale golden brown and clean with minimal impurities. It's so soft that it can be used as is, just like the best Japanese rope. If you are really fussy, just singe off the fuzzies, which are minimal, and treat it with oil or wax, e.g. NaWaX. However, it will break in and mature beautifully with just a bit of use.
In the photo below, you can see some premium Japanese ropes (2 outer left and right) and, in the centre, some 5mm Osaka which has been oiled and singed. I suspect that the main difference you will feel is in your wallet ;-)