How about :
\version "2.18.2"
\layout { ragged-right = ##f }
#(define mydrums '((kumi-daiko default #t 0)))
kumi-daiko-staff = {
\override Staff.StaffSymbol.line-positions = #'( 0 )
\override Staff.BarLine.bar-extent = #'(-1.5 . 1.5)
\set DrumStaff.instrumentName = #"Kumi-daiko"
}
%% Flip noteheand:
#(define-markup-command (flip layout props arg) (markup?)
(interpret-markup layout props
(markup #:concat (#:null #:scale (cons -1 1) #:line (arg)))))
fl = {
\once\override NoteHead.stencil = #(lambda (grob)
ly:note-head::print (grob-interpret-markup grob
#{
\markup
\flip
\musicglyph #"noteheads.s2"
#}))
\once\override NoteHead.stem-attachment = #'(-0.7 . 0.3)
}
\new DrumStaff {
\kumi-daiko-staff
\set DrumStaff.drumStyleTable = #(alist->hash-table mydrums)
\drummode {
tt4*4 \fl tt tt \fl tt tt4*2 \fl tt tt \fl tt
}
}
Cheers,
~Pierre