The rst version of the AKARI far-infrared All-Sky Bright Source Catalogue (BSC ver.1) was released to public in March 2010. It has been widely used for various astrophysical researches. We are continuing efforts to produce the next edition. The new version is expected to be improved in accuracy and reliability, as well as its volume. Many improvements to the next version are in progress. The time-line signal is being re-examined throughout the entire data processing. Correction processes for signal linearity and detector responsivity, and procedure for masking signal anomaly are revised. The source extraction process is further tuned and operating parameters will be optimized. These bring better reliability of the source detection and possibly an increase of source numbers. The position accuracy is expected to be improved. Systematic position error seen around the Galactic plane will also be corrected. We also plan to deliver the Faint Source Catalogue version 1.

ABSTRACT
1. THE AKARI FIR BRIGHT SOURCE CATALOGUE
2. IMPROVEMENTS
    2.1. Pipeline processes
    2.2. Source extraction process
3. CHARACTERISTIC INVESTIGATION
    3.1. Non-flat source detection on the all-sky map
    3.2. Comparison with IRAS catalog
    3.3. Position dispersion and the systematic error
    3.4. Data sampling time problem
4. FAINT SOURCE CATALOGUE
REFERENCES

• Sin'itirou Makiuti(Institute of Space and Astronautical Science)
• Issei Yamamura(Institute of Space and Astronautical Science)
• Tatsuya Koga(Institute of Space and Astronautical Science)
• Tatsuya Nakada(Institute of Space and Astronautical Science)
• AKARI team(Institute of Space and Astronautical Science)