Information on multiple synteny between plants and/or within a plant is key 
information to understand genome evolution. In addition, visualization of 
multiple synteny is helpful in interpreting evolution. So far, some web 
applications have been developed to determine and visualize multiple homology 
regions at once. However, the applications are not fully convenient for 
biologists because some of them do not include the function of synteny 
determination but visualize the multiple synteny plots by allowing users to 
upload their synteny data by determining the synteny based only on BLAST 
similarity information, with some algorithms not designed for synteny 
determination. Here, we introduce a web application that determines and 
visualizes multiple synteny from two types of files, simplified browser 
extensible data and protein sequence file by MCScanX algorithm, which have been 
used in many synteny studies.