In the book (Jigoro Kano and the Kodokan - An Innovative response to modernisation, Kano Sensei Biographic Editorial Commitee a Alex Bennett, Kodokan Judo Institute, 2009) are also included translations of certificates of May 20, 1894 test Kodokan in Shimotomizaka-cho. Certificates at lower levels at that time were printed and From 4.danu Kano wrote them handly. Interestingly, the instructor is designated to the person who receives the degree 6.dan. It is also interesting to note how different the words in individual certificates of recommendations for further work (in english translation): will continue in training / study will / must continue to study. My sense of it is that a higher degree granting from Kano he committed his pupils to the continuation and deeper study.
Shodan, 2-dan and 3-dan
"The bearer of this certificate has made great efforts in studying Nihon-den Kódókan Júdó and has demonstrated sufficient progress to be awarded the grade of shodan (2-dan, 3-dan). The holder of this certificate will continue training to improve his skills".
4-dan and 5-dan
"Over the course of many years, the bearer of this certificate has made great efforts studying Nihon-den Kódókan Júdó, demonstrating high technical ability, and is hereby awarded the grade of 4-dan (or 5-dan). The holder of this certificate will study to become an instructor."
6-dan and above
"Over the course of many years the bearer of this certificate has made great efforts studying Nihon-den Kódókan Júdó, demonstrating a mastery of techniques, and is hereby awarded the grade of 6-dan. The holder of this certificate must continue to study to become a true master (Shihan)."
Shodan, 2-dan and 3-dan
"The bearer of this certificate has made great efforts in studying Nihon-den Kódókan Júdó and has demonstrated sufficient progress to be awarded the grade of shodan (2-dan, 3-dan). The holder of this certificate will continue training to improve his skills".
4-dan and 5-dan
"Over the course of many years, the bearer of this certificate has made great efforts studying Nihon-den Kódókan Júdó, demonstrating high technical ability, and is hereby awarded the grade of 4-dan (or 5-dan). The holder of this certificate will study to become an instructor."
6-dan and above
"Over the course of many years the bearer of this certificate has made great efforts studying Nihon-den Kódókan Júdó, demonstrating a mastery of techniques, and is hereby awarded the grade of 6-dan. The holder of this certificate must continue to study to become a true master (Shihan)."