%AFang, Ke%AMurase, Kohta%BJournal Name: The Astrophysical Journal; Journal Volume: 919; Journal Issue: 2 %D2021%I %JJournal Name: The Astrophysical Journal; Journal Volume: 919; Journal Issue: 2 %K %MOSTI ID: 10349764 %PMedium: X %TMultimessenger Implications of Sub-PeV Diffuse Galactic Gamma-Ray Emission %X %0Journal Article