It looks like ipamonafont has fallen off the face of the Earth. There is a copy at http://web.archive.org/web/20170702170402/http://www.geocities.jp/ipa_mona/opfc-ModuleHP-1.1.1_withIPAMonaFonts-1.0.8.tar.gz if it's considered worth mirroring.
*** Bug 689842 has been marked as a duplicate of this bug. ***
*** Bug 692646 has been marked as a duplicate of this bug. ***
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=761c798d4b78f7ebe23353f381ceaa2da896ae27 commit 761c798d4b78f7ebe23353f381ceaa2da896ae27 Author: shimataro <shimataro@zelkova.cc> AuthorDate: 2019-07-30 13:00:17 +0000 Commit: Naohiro Aota <naota@gentoo.org> CommitDate: 2019-09-02 21:37:15 +0000 media-fonts/ipamonafont: update HOMEPAGE and SRC_URI Closes: https://bugs.gentoo.org/682546 Signed-off-by: shimataro <shimataro@zelkova.cc> Closes: https://github.com/gentoo/gentoo/pull/12579 Signed-off-by: Naohiro Aota <naota@gentoo.org> media-fonts/ipamonafont/ipamonafont-1.0.8.ebuild | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)