We carry out a study of Sub-Millimeter Galaxies (SMGs) in the AKARI NEP-Deep field using the James Clerk Maxwell Telescope (JCMT) SCUBA-2 850 μm source catalog, released as part of the SCUBA-2 Cosmology Legacy Survey (S2CLS) program. The SCUBA-2 850 μm map has a root mean square (rms) noise of 1.2 mJy beam−1 and covers an area of 0.60 degree2. We find four SMGs which have counterparts to Herschel sources with spectroscopic redshifts in the literature. In addition, three dust obscured galaxies (DOGs) detected in Herschel bands are selected as a comparison sample. We derive IR luminosities of SMGs using the CIGALE code, which are similar to those of high redshift SMGs from previous studies. The contribution of AGN to the total IR luminosity in SMGs (2%–11%) is smaller than the lower limit for the one in DOGs (19%–35%), which is consistent with the expectation from the evolutionary scenario of massive galaxies. We search for SMGs in overdense regions as protocluster candidates and investigate four regions, including candidates around three DOGs. Finally, we argue that follow-up spectroscopic observation for the NEP-Deep field will provide crucial information to understand the role of SMGs in the evolution of massive galaxies.

Abstract
1. INTRODUCTION
2. OBSERVATION DATA AND SAMPLES
    2.1. Observation Data
    2.2. Samples
3. ANALYSIS OF COUNTERPARTS
4. SED
5. DISCUSSION AND SUMMARY
    5.1. Contribution of AGN
    5.2. Protocluster Candidates
REFERENCES

• Hyunjong Seo(Korea Astronomy and Space Science Institute) Corresponding author
• Woong-Seob Jeong(Korea Astronomy and Space Science Institute/Korea University of Science and Technology)
• Minjin Kim(Korea Astronomy and Space Science Institute/Korea University of Science and Technology)
• Seong Jin Kim(Korea Astronomy and Space Science Institute/Institute of Astronomy, National Tsing Hua University)
• Jongwan Ko(Korea Astronomy and Space Science Institute/Korea University of Science and Technology)
• Jeonghyun Pyo(Korea Astronomy and Space Science Institute)
• Min Gyu Kim(Genesia Corporation/Department of Physics and Astronomy, Seoul National University)
• Chris Pearson(RAL Space, Rutherford Appleton Laboratory/School of Physical Sciences, The Open University/Oxford Astrophysics, Denys Wilkinson Building, University of Oxford)
• Laia Barrufet(RAL Space, Rutherford Appleton Laboratory/School of Physical Sciences, The Open University)
• Maria del Carmen Campos Varillas(RAL Space, Rutherford Appleton Laboratory)
• Hideo Matsuhara(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
• Matt Malkan(Department of Physics and Astronomy, University of California)
• Helen K. Kim(Department of Physics and Astronomy, University of California)
• Toshinobu Takagi(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
• Takamitsu Miyaji(Instituto de Astronom´ıa sede Ensenada/PO BOX 439027)
• Tomotsugu Goto(Institute of Astronomy, National Tsing Hua University)
• Nagisa Oi(Tokyo University of Science)