the width of the column is always smaller that expected when the value of cells contains Asian Characters. *same error exists in version 4.0.0 Final.
Created attachment 36149 [details] Column A which contains Japanese characters Column A which contains Japanese characters is set to smaller width than expected.
Does this only happen for SXSSF, or does it happen for XSSF and HSSF too? If SXSSF only, how are you setting up the column size tracking? Do you have the relevant Asian fonts installed on your machine *and* properly available to Java?
No additional information provided for a long time and we cannot properly reproduce this with the amount of information given, thus I have to cose this for now, please reopen with more information and source-code which reproduces the problem.
Seems similar to https://bz.apache.org/bugzilla/show_bug.cgi?id=64811