set "In:" in front of journaltitle

Question

sorry for all the questions, your help was amazing so far!

I have yet another question. I want journal titles in articles to be preceded by

In:

just like in collections (example of incollection below)

current article: In front of the Asahi should be an

In:

I am a bit at a loss how to achieve this. Thank you in advance and have a nice evening! :)

Latex example: https://www.overleaf.com/read/dvtrpzgfqghn

new issue of inconsistent (Hg.)

-- Edit: I hope that's an okay example :) The parts after Hg now lack some spaces for some reason :<

\documentclass{scrreprt}
\usepackage[onehalfspacing]{setspace}
\usepackage[main=ngerman, english]{babel}
%----------------------------------------------------------------------------
%   BIB
%----------------------------------------------------------------------------
  \usepackage[
    backend=biber,
    style=authoryear,
    sorting=nyvt
  ]{biblatex}
\renewcommand{\mkbibnamefamily}[1]{\textsc{#1}}
\renewcommand{\labelnamepunct}{\addcolon\space}
\DeclareFieldFormat{postnote}{#1}
\DeclareFieldFormat{multipostnote}{#1}
\renewcommand\postnotedelim{\addcolon\addspace}
\DeclareFieldFormat
  [article,inbook,incollection,inproceedings,patent,thesis,unpublished]
  {title}{#1\isdot}

% sets Hg
\renewbibmacro*{in:}{%
  \printtext{%
     \bibstring{in}\intitlepunct}%
  \ifentrytype{incollection}
    {\DeclareNameAlias{editor}{last-first}%
     \ifnameundef{editor}
       {}
       {\printnames{editor}%
        \setunit{\printunit{editortypedelim}}%
        \usebibmacro{editorstrg}%
        \setunit{\addcolon\addspace}}%
     \usebibmacro{maintitle+booktitle}%
     \clearfield{maintitle}%
     \clearfield{booktitle}%
     \clearfield{volume}%
     \clearfield{part}%
     \clearname{editor}}
    {}}

% Use Hg. in parentheses after editor
\DeclareDelimFormat{editortypedelim}{\addspace}
\DeclareFieldFormat{editortype}{\mkbibparens{#1}}
\DefineBibliographyStrings{german}{%
     editor = {Hg\adddot}
     andothers = {et\ al\adddot}, %et al. statt u.a.
     editor = {{Hg\adddot}}, %Hg. statt Hrsg.
     editors = {{Hgg\adddot}}, %Hgg. plural
     byeditor = {{Hg\adddot}},
}

\begin{filecontents*}{\jobname.bib}
@book{CommissionontheHumanities.1980,
 editor = {{Commission on the Humanities}},
 year = {1980},
 title = {The Humanities in American Life},
 keywords = {Humanities},
 publisher = {{University of California Press}},
 isbn* = {0520041836},
 subtitle = {Report of the Commission on the Humanities},
 location = {Berkeley and London},
 abstract = {},
 organization = {{Commission on the Humanities}}
}

@incollection{Gotoda.1990,
 author = {Got{\^o}da, Masaharu},
 year = {1990},
 title = {Shin no minshu shugi o mezashite},
 titleaddon = {Eine wirkliche Demokratie anstreben},
 publisher = {Seibund{\^o}},
 maintitle = {Shishunki no seiji},
 maintitleaddon = {Politik in der Pubert{\"a}t},
 pagetotal = {34--59},
 location = {T{\^o}ky{\^o}},
 abstract = {},
 editor = {Yasuoka, Okiharu},
}
\end{filecontents*}
\addbibresource{\jobname.bib}
%----------------------------------------------------------------------------
%   MAIN
%----------------------------------------------------------------------------
\begin{document}
\nocite{*}
\printbibliography[heading=bibintoc,title={Literaturverzeichnis}]

\end{document}

Answer 1

You have a redefinition of the in: bibmacro in your code. (For the benefit of future readers of this Q&A: The original redefinition of the in: bibmacro is not the one shown in the MWE in the question. The original code was only posted as link to Overleaf which may or may not be accessible in the future. The MWE in the question already contains the result of a first – and almost successful, but ultimately buggy – attempt to resolve the original problem – see also the edit history of this answer, if you are interested in embarrassing typos on my part.)

You probably want that redefinition to be slightly different to make sure that the "in" is printed at all times and not just for @incollection: Simply move the bit of code that prints the "in" outside the conditional. I also fixed a few possible spurious spaces and tries to modernise the entire thing, that way it plays nicely with your other definitions (namely the editortype format).

\documentclass{scrreprt}
\usepackage[onehalfspacing]{setspace}
\usepackage[main=ngerman, english]{babel}

\usepackage[backend=biber, style=authoryear, sorting=nyvt]{biblatex}

\renewcommand{\mkbibnamefamily}[1]{\textsc{#1}}
\DeclareDelimFormat[bib]{nametitledelim}{\addcolon\space}

\DeclareFieldFormat{postnote}{#1}
\DeclareFieldFormat{multipostnote}{#1}
\renewcommand\postnotedelim{\addcolon\addspace}

\DeclareFieldFormat
  [article,inbook,incollection,inproceedings,patent,thesis,unpublished]
  {title}{#1\isdot}

\renewbibmacro*{in:}{%
  \printtext{%
     \bibstring{in}\intitlepunct}%
  \ifentrytype{incollection}
    {\DeclareNameAlias{editor}{family-given}%
     \ifnameundef{editor}
       {}
       {\printnames{editor}%
        \setunit{\printdelim{editortypedelim}}%
        \usebibmacro{editorstrg}%
        \setunit{\addcolon\space}}%
     \usebibmacro{maintitle+booktitle}%
     \clearfield{maintitle}%
     \clearfield{booktitle}%
     \clearfield{volume}%
     \clearfield{part}%
     \clearname{editor}}
    {}}

\DeclareDelimFormat{editortypedelim}{\addspace}
\DeclareFieldFormat{editortype}{\mkbibparens{#1}}
\DefineBibliographyStrings{german}{%
  editor    = {Hg\adddot}
  andothers = {et\ al\adddot}, %et al. statt u.a.
  editor    = {{Hg\adddot}}, %Hg. statt Hrsg.
  editors   = {{Hgg\adddot}}, %Hgg. plural
  byeditor  = {{Hg\adddot}},
}

\begin{filecontents*}{\jobname.bib}
@book{CommissionontheHumanities.1980,
  editor       = {{Commission on the Humanities}},
  year         = {1980},
  title        = {The Humanities in {American} Life},
  keywords     = {Humanities},
  publisher    = {University of California Press},
  isbn         = {0520041836},
  subtitle     = {Report of the Commission on the Humanities},
  location     = {Berkeley and London},
  organization = {Commission on the Humanities}
}

@incollection{Gotoda.1990,
  author         = {Got{\^o}da, Masaharu},
  year           = {1990},
  title          = {Shin no minshu shugi o mezashite},
  titleaddon     = {Eine wirkliche Demokratie anstreben},
  publisher      = {Seibund{\^o}},
  maintitle      = {Shishunki no seiji},
  maintitleaddon = {Politik in der Pubert{\"a}t},
  pagetotal      = {34--59},
  location       = {T{\^o}ky{\^o}},
  editor         = {Yasuoka, Okiharu},
}
\end{filecontents*}
\addbibresource{\jobname.bib}

\begin{document}
\nocite{*}
\printbibliography[heading=bibintoc, title={Literaturverzeichnis}]
\end{document}

---

I personally would not recommend this approach to print the editors of an @incollection before the booktitle. Instead I would use biblatex-ext's innamebeforetitle option, but then I'm obviously biased...